S-2.1, r. 13 - Regulation respecting occupational health and safety

Schedule Disposition versions

2024-04-28

SCHEDULE I

(ss. 41, 42, 43, 66, 108 and 302)

PERMISSIBLE EXPOSURE VALUES FOR GASES, DUSTS, FUMES, VAPOURS OR MISTS IN THE WORK ENVIRONMENT

DEFINITIONS AND NOTES

This Schedule must be read in accordance with the following notations and definitions:

(1) CARCINOGENS: The designations under “carcinogen” in the Designation and remarks column refer to the following:

C1: carcinogenic effect detected in humans

C2: carcinogenic effect suspected in humans

C3: carcinogenic effect detected in animals. Results of studies relating to the carcinogenocity of these substances in animals are not necessarily applicable to humans.

(2) CAS: Number given by the Chemical Abstracts Service, a division of the American Chemical Society, for the identification of a substance (see part 4).

(3) C: CEILING: The designation “C” in the STEV/Ceiling column refers to a concentration never be exceeded during any length of time whatsoever.

(4) EM: A substance to which exposure must be reduced to a minimum in accordance with section 42.

(4.1) EX: a substance that is flammable and exposure to the permissible exposure value level involves a risk of exceeding 10% of the lower explosion limit.

(5) EXCURSION LIMITS: These limits apply to substances which do not have a short-term exposure value. Provided the time-weighted average exposure value is not exceeded, excursions in exposure levels may exceed 3 times that value for a cumulative period not exceeding a total of 30 minutes during a workday. Notwithstanding the foregoing, none of those excursions in exposure levels may exceed 5 times the time-weighted average exposure value during any length of time whatsoever.

(5.1) IFV: inhalable fraction and vapour.

(5.2) J: excluding stearates of toxic metals.

(6) mg/m3: milligram per cubic meter (milligram of substance per cubic meter of air).

(7) Pc: SKIN (percutaneous): The designation “Pc” in the Designation and remarks column refers to the potentially significant contribution to the overall exposure by the cutaneous route. Exposure is by contact with vapours or, of probable greater significance, by direct skin contact with the substance. The cutaneous route includes mucous membranes and the eyes.

(8) ppm: part per million (parts of gas or vapour per million parts of airborn contaminants per volume measured at 25 °C and 101.3 kPa).

(9) Rd: Respirable dust.

(9.1) Pi: inhalable aerosol fraction.

(10) RESPIRABLE FIBRES (other than respirable asbestos fibres): Objects, other than respirable asbestos fibres, longer than 5 µm, having a diameter of less than 3 µm and a ratio of length to diameter of more than 3 :1.

(11) Pr: respirable aerosol fraction.

(12) TPM: total particulate matter.

(12.1) Pthor: thoracic aerosol fraction.

(13) SIMPLE ASPHYXIANT: A physiologically inert gas which acts primarily by displacing airborne oxygen and that can cause a decrease in the percentage in volume of airborne oxygen below the 19.5% provided for in section 40 and required to maintain blood oxygen saturation.

(14) STEV: SHORT-TERM EXPOSURE VALUE: The 15-minute time-weighted average concentration for exposure to a chemical substance (in the form of gases, dusts, fumes, vapours or mists), present in the air in a worker’s respiratory zone which should not be exceeded at any time during a workday, even if the time-weighted average exposure value is not exceeded.

The average exposure for a 15-minute consecutive period may be include between the TWAEV and the STEV, insofar as such exposures are not repeated more than 4 times a day and have intervals between them of periods of at least 60 minutes.

(14.1) S(D): a substance causing dermal sensitization.

(14.2) S(R): a substance causing respiratory sensitization.

(14.3) OTO: OTOTOXIC: the “OTO” notation in the Designation and remarks column indicates that repeated exposure to the substance may cause hearing impairment alone or in combination with noise, even below 85 dBA.

(15) Td: Total dust.

(15.1) Thord: thoracic dust.

(16) TWAEV: TIME-WEIGHTED AVERAGE EXPOSURE VALUE: The time-weighted average concentration for an 8-hour workday and a 40-hour workweek of a chemical substance (in the form of gases, dusts, fumes, vapours or mists) present in the air in a worker’s respiratory zone.

For any work period equal to or longer than 4 hours but less than 8 hours or a period in excess of 8 hours but less than or equal to 16 hours, an adjusted average exposure value (AAEV) must be established in accordance with the Guide to the adjustment of permissible exposure values for unusual work schedules, published by the Institut de recherche Robert-Sauvé en santé et en sécurité du travail. Under no circumstance may the AAEV be higher than the TWAEV.

EXPLANATION OF NOTES:

Note 1: The standard corresponds to dust containing no asbestos and the percentage in crystalline silica is less than 1%.

Note 2a: Permissible asbestos exposure values in number of respirable fibres per cm3.

Note 2b: Permissible recirculation concentration of asbestos respirable dust: 0.1 mg/m3.

Note 3: Where the use of these products is permitted.

Note 4: Permissible exposure values in number of respirable fibres per cm3.

Part 1

PERMISSIBLE EXPOSURE VALUES FOR AIRBORNE CONTAMINANTS

			TWAEV		STEV/Ceiling		Designation and remarks
	Substance	[#CAS]	ppm	mg/m3	ppm	mg/m3
Abate			See Temephos
Acetaldehyde		[75-07-0]			C25	C45	C3,RP
Acetamide		[60-35-5]	1				C3,IFV
Acetic acid		[64-19-7]	10	25	15	37
Acetic anhydride		[108-24-7]	1		3
Acetone		[67-64-1]	250		500
Acetone cyanohydrin (as CN)		[75-86-5]			C4.7	C5	Pc,RP
Acetonitrile		[75-05-8]	20				Pc
Acetophenone		[98-86-2]	10	49
Acetylene		[74-86-2]	Simple asphyxiant
Acetylene dichloride			See 1,2-Dichloroethylene
Acetylene tetrabromide			See 1,1,2,2-Tetrabromoethane
Acetylsalicylic acid (Aspirin)		[50-78-2]		5
Acrolein		[107-02-8]	0.1	0.23	0.3	0.69
Acrylamide		[79-06-1]		0.03			Pc,C2,EM
Acrylic acid		[79-10-7]	2	5.9			Pc
Acrylonitrile		[107-13-1]	2	4.3			Pc,C2,RP,EM
Actinolite			See Asbestos
Adipic acid		[124-04-9]		5
Adiponitrile		[111-69-3]	2	8.8			Pc
Alachlore		[15972-60-8]		1			C3,S(D),IVF
Aldrin		[309-00-2]		0.05			C3,Pc,IVF
Allyl alcohol		[107-18-6]	0.5				Pc
Allyl chloride			See 3-Chloropropene
Allyl glycidyl ether (AGE)		[106-92-3]	1
Allyl methacrylate		[96-05-9]	1				Pc
Allyl propyl disulfide		[2179-59-1]	0.5				S(D)
Aluminum and its compounds				5			Rd
4-Aminodiphenyl		[92-67-1]	Without applicable permissible exposure value				Pc,C1,RP,EM
2-Aminoethanol		[141-43-5]	3	7.5	6	15
2-Aminopyridine		[504-29-0]	0.5	1.9
3-Amino-1,2,4-triazole			See Amitrole
Amitrole		[61-82-5]		0.2			C3,RP
Ammonia		[7664-41-7]	25	17	35	24
Ammonium chloride fume		[12125-02-9]		10		20
Ammonium perfluorooctanoate		[3825-26-1]		0.01			C3,Pc
Ammonium sulfamate		[7773-06-0]		10
Amosite			See Asbestos
Aniline		[62-53-3]	2	7.6			Pc
o-Anisidine		[90-04-0]	0.1	0.5			Pc,C3
p-Anisidine		[104-94-9]	0.1	0.5			Pc
Anthophyllite			See Asbestos
Antimony [7440-36-0], metal and compounds (as Sb)				0.5
Antimony trioxide (as Sb)		[1309-64-4]		0.5			C3
Antimony trioxide, production (as Sb)			Without applicable permissible exposure value				C2,RP,EM
ANTU (α-Naphthylthiourea)		[86-88-4]		0.3
Argon		[7440-37-1]	Simple asphyxiant
Arsenic, elemental [7440-38-2], and inorganic compounds (except Arsine), (as As)				0.01			C1,RP,EM
Arsine		[7784-42-1]	0.005
Asbestos – All forms (note 2a) (note 2b)		[1332-21-4]		0.1 fibre/cm3			C1,EM
	Actinolite	[12172-67-7]		0.1 fibre/cm3			C1,EM
	Amosite (note 3)	[12172-73-5]		0.1 fibre/cm3			C1,EM
	Anthophyllite	[77536-67-5]		0.1 fibre/cm3			C1,EM
	Chrysotile	[12001-29-5]		0.1 fibre/cm3			C1,EM
	Crocidolite (note 3)	[12001-28-4]		0.1 fibre/cm3			C1,EM
	Tremolite	[14567-73-8]		0.1 fibre/cm3			C1,EM
Asphalt (petroleum) fumes		[8052-42-4]		5
Aspirin			See Acetylsalicylic acid
Atrazine and symmetric triazine analogs		[1912-24-9]		2			C3,Id
Attapulgite			See Fibres-Natural Mineral Fibres
Azinphos-methyl		[86-50-0]		0.2			Pc,S(D),IVF
1-Bromopropane		[106-94-5]	0.1				C3
Barium [7440-39-3], soluble compounds (as Ba)				0.5
Barium sulfate		[7727-43-7]		5			Id, note 1
Bendiocarb		[22781-23-3]		0.1			Pc
Benomyl		[17804-35-2]		1			C3,S(D),Id
Benz(a)anthracene		[56-55-3]	Without applicable permissible exposure value				C2,EM
Benzene		[71-43-2]	0.5		2.5		C1,RP,EM,Pc
Benzene (trichloromethyl)		[98-07-7]			P0.1		C2,Pc,RP,EM
Benzidine (production)		[92-87-5]	Without applicable permissible exposure value				Pc,C1,RP,EM
Benzo(a)pyrene		[50-32-8]		0.005			C2,RP,EM
Benzo(b)fluoranthene		[205-99-2]	Without applicable permissible exposure value				C2,EM
p-Benzoquinone		[106-51-4]	0.1	0.44
Benzoyl peroxide		[94-36-0]		5
Benzyl acetate		[140-11-4]	10
Benzyl chloride		[100-44-7]	1				C3
		[1303-96-4]
Beryllium [7440-41-7], metal and compounds (as Be)				0.00015			C1,RP,EM,S
Biphenyl		[92-52-4]	0.2	1.3
Bismuth telluride (as Bi2Te3)
	Se-doped			5
	Undoped	[1304-82-1]		10
Bitumen			See Asphalt fumes
Borate, inorganic compounds, (including boric acid)		[1330-43-4]
		[10043-35-3]
		[12179-04-3]		2		6	Id
Borax			See Sodium tetraborate, decahydrate
Boron oxide		[1303-86-2]		10
Boron tribromide		[10294-33-4]			C0.7		RP
Boron trichloride		[10294-34-5]			C0.7		RP
Boron trifluoride		[7637-07-2]	0.1		C0.7		RP
Boron trifluoride ethers		[109-63-7];	0.1		P0.7
		[353-42-4]
Bromacil		[314-40-9]		10			C3
Bromine		[7726-95-6]	0.1	0.66	0.2	1.3
Bromine pentafluoride		[7789-30-2]	0.1	0.72
Bromochloromethane			See Chlorobromethane
2-Bromo-2-chloro-1,1,1-trifluoroethane			See Halothane
Bromoethane			See Ethyl bromide
Bromoethylene			See Vinyl bromide
Bromoform		[75-25-2]	0.5				C3
Bromomethane			See Methyl bromide
Bromotrifluoromethane		[75-63-8]	1000	6090
1,3-Butadiene		[106-99-0]	2	4.4			C2,EM
Butane		[106-97-8]	800	1900
Butanethiol			See Butyl mercaptan
2-Butanone			See Methyl ethyl ketone (MEK)
2-Butoxyethanol		[111-76-2]	20				C3
2-Butoxyethyl acetate		[112-07-2]	20				C3
Butyl acetate (all isomers)		[105-46-4]
		[110-19-0]
		[123-86-4]
		[540-88-5]	50		150
n-Butyl acrylate		[141-32-2]	2				S(D)
n-Butyl alcohol		[71-36-3]	20
sec-Butyl alcohol		[78-92-2]	100	303
tert-Butyl alcohol		[75-65-0]	100	303
Butyl cellosolve®			See 2-Butoxyethanol
tert-Butyl chromate (as CrO3)		[1189-85-1]				C0.1	Pc, RP
n-Butyl glycidyl ether (BGE)		[2426-08-6]	3				Pc, S(D)
tert-Butyl hydroperoxide		[75-91-2]	0.1				Pc
n-Butyl lactate		[138-22-7]	5	30
Butyl mercaptan		[109-79-5]	0.5	1.8
n-Butylamine		[109-73-9]			C5	C15	Pc, RP
o-sec-Butylphenol		[89-72-5]	5	31			Pc
p-tert-Butyltoluene		[98-51-1]	1	6.1
Cadmium elemental and compounds (as Cd)		[7440-43-9]		0.01			C2, RP, EM
Calcium carbonate		[471-34-1]		10			Td
Calcium carbonate		[1317-65-3]		10			Td, note 1
Calcium cyanamide		[156-62-7]		0.5
Calcium hydroxide		[1305-62-0]		5
Calcium oxide		[1305-78-8]		2
Calcium silicate		[1344-95-2]		1			Pi,Note 1
Calcium sulfate		[7778-18-9]
		[13397-24-5]
		[10034-76-1]
		[10101-41-4]		10			Id, note 1
Camphor (synthetic)		[76-22-2]	2	12	3	19
Caprolactam		[105-60-2]		5			IFV
Captafol		[2425-06-1]		0.1			Pc
Captan		[133-06-2]		5			C3,Id,S(D)
Carbaryl		[63-25-2]		0.5			Pc,IVF
Carbofuran		[1563-66-2]		0.1			IVF
Carbon black		[1333-86-4]		3			C3 Id
Carbon dioxide		[124-38-9]	5000	9000	30000	54000
Carbon disulfide		[75-15-0]	1				Pc
Carbon monoxide		[630-08-0]	35		175
Carbon tetrabromide		[558-13-4]	0.1	1.4	0.3	4.1
Carbon tetrachloride		[56-23-5]	5	31	10	63	Pc,C2,EM
Carbon, fibres			See Fibres-Organic Synthetic Fibres
Carbonyl chloride			See Phosgene
Carbonyl fluoride		[353-50-4]	2	5.4	5	13
Catechol		[120-80-9]	5				C3,Pc
Cellosolve® acetate			See 2-Ethoxyethyl acetate
Cellulose (paper fibres)		[9004-34-6]		10			Td, note 1
Ceramic (fibres)			See Fibres-Artificial Vitreous Mineral Fibres
Cesium hydroxide		[21351-79-1]		2
Chlordane		[57-74-9]		0.5			Pc,C3,IFV
Chlorinated camphene		[8001-35-2]		0.5		1	Pc,C3
Chlorinated diphenyl oxide		[31242-93-0]		0.5
Chlorinated diphenyl oxide		[55720-99-5]		0.5
Chlorine		[7782-50-5]			P0.5
Chlorine dioxide		[10049-04-4]			P0.1
Chlorine trifluoride		[7790-91-2]			C0.1	C0.38	RP
2-Chloro-6-(trichloromethyl) pyridine			See Nitrapyrin
Chloroacetaldehyde		[107-20-0]			C1	C3.2	RP
Chloroacetone		[78-95-5]			C1	C3.8	Pc,RP
α-Chloroacetophenone		[532-27-4]	0.05	0.32
Chloroacetyl chloride		[79-04-9]	0.05	0.23	0.15	0.69	Pc
Chlorobenzene		[108-90-7]	10				C3
o-Chlorobenzylidene malononitrile		[2698-41-1]			C0.05		Pc,S,RP
Chlorobromomethane		[74-97-5]	200	1060
2-Chloro-1,3-butadiene			See ß-Chloroprene
Chlorodifluoromethane		[75-45-6]	1000	3540
Chlorodiphenyl (42% chlorine)		[53469-21-9]		1			Pc,C2,EM
Chlorodiphenyl (54% chlorine)		[11097-69-1]		0.5			Pc,C2,EM
1-Chloro-2,3-epoxypropane			See Epichlorohydrin
Chloroethane			See Ethyl chloride
2-Chloroethanol			See Ethylene chlorohydrin
bis (Chloroethyl) ether			See Dichloroethyl ether
Chloroethylene			See Vinyl chloride (monomer)
Chloroform		[67-66-3]	5	24.4			C2,RP,EM
Chloromethane			See Methyl chloride
Chloromethyl methyl ether		[107-30-2]	Without applicable permissible exposure value				C1,RP,EM
bis (Chloromethyl) ether		[542-88-1]	0.001	0.0047			C1,RP,EM
p-Chloronitrobenzene			See p-Nitrochlorobenzene
1-Chloro-1-nitropropane		[600-25-9]	2	10
Chloropentafluoroethane		[76-15-3]	1000	6320
Chloropicrin		[76-06-2]	0.1	0.67
ß-Chloroprene		[126-99-8]	1				Pc,C2,RP,EM
3-Chloropropene		[107-05-1]	1	3	2	6
2-Chloropropionic acid		[598-78-7]	0.1	0.44			Pc
o-Chlorostyrene		[2039-87-4]	50	283	75	425
o-Chlorotoluene		[95-49-8]	50	259
Chlorpyrifos		[2921-88-2]		0.1			Pc,IVF
Chromium (metal)		[7440-47-3]		0.5			Pi
Chromium III compounds (as Cr)				0.5
Chromium VI, water insoluble inorganic compounds (as Cr)				0.001			C1,RP,EM
Chromium VI, water soluble inorganic compounds (as Cr)				0.05			C1,RP,EM,S
Chromyl chloride (as Cr)		[14977-61-8]	0.0001		0.00025		Pc,C1,RP,EM,S(D),S(R),IFV
Chrysene		[218-01-9]	Without applicable permissible exposure value				C2,RP,EM
Chrysotile			See Asbestos
Citral		[5392-40-5]	5				Pc, S(D), IFV
Clopidol		[2971-90-6]		3			IFV
Coal dust		[8029-10-5];		0.9			Pr
		[308062-82-0]
Coal tar pitch volatiles, as benzene solubles		[65996-93-2]		0.2			C1,RP,EM
Cobalt hydrocarbonyl (as Co)		[16842-03-8]		0.1
Cobalt tetracarbonyl (as Co)		[10210-68-1]		0.1
Cobalt, elemental and inorganic compounds (as Co)		[7440-48-4]		0.02			Pi,C3,S(D),S(R)
Continuous filament fibres (fibrous glass)			See Fibres-Artificial Vitreous Mineral Fibres
Copper [7440-50-8], fume (as Cu)				0.2
Copper [7440-50-8], dusts & mists (as Cu)				1
Cotton dust				0.1			Thord
Coumaphos		[56-72-4]		0.05			Pc,IFV
Coyden®			See Clopidol
Crag®			See Sesone
Cresol (all isomers)		[1319-77-3]
		[95-48-7]
		[108-39-4]
		[106-44-5]		20			Pc,IFV
Cristobalite			See Silica
Crocidolite			See Asbestos
Crotonaldehyde		[4170-30-3]			C0.3		C3,Pc
Crufomate®		[299-86-5]		5
Cumene		[98-82-8]	5				C3
Cyanamide		[420-04-2]		2
Cyanazine		[21725-46-2]		0.1			Pi,C3
Cyanides (as CN)		[143-33-9];				P5	Pc
		[151-50-8];
		[592-01-8]
Cyanogen		[460-19-5]			C5
Cyanogen bromide		[506-68-3]			C0.3
Cyanogen chloride		[506-77-4]			C0.3	C0.75	RP
Cyclohexane		[110-82-7]	300	1030
Cyclohexanol		[108-93-0]	50	206			Pc
Cyclohexanone		[108-94-1]	20		50		Pc,C3
Cyclohexene		[110-82-7]	100
Cyclohexylamine		[108-91-8]	10	41
Cyclonite		[121-82-4]		0.5			Pc
Cyclopentane		[287-92-3]	600	1720
Cyhexatin		[13121-70-5]		5
2,4-D		[94-75-7]		10			Pc,Id
DDT (Dichlorodiphenyltrichloroethane)		[50-29-3]		1			C3
Decaborane		[17702-41-9]	0.05	0.25	0.15	0.75	Pc
Demeton®		[8065-48-3]		0.05			Pc,IVF
Di-sec-octyl phthalate		[117-81-7]		5		10	C3
2,6-Di-tert-butyl-p-cresol		[128-37-0]		2			IFV
Diacetone alcohol		[123-42-2]	50	238
Diacetyl		[431-03-8]	0.01		0.02
4,4’-Diaminodiphenylmethane			See 4,4’-Methylene dianiline
1,2-Diaminoethane			See Ethylenediamine
1,6-Diaminohexane		[124-09-4]	0.5	2.3
Diatomaceous earth			See Silica
Diazinon®		[333-41-5]		0.01			Pc,IVF
Diazomethane		[334-88-3]	0.2				C2,RP,EM
Diborane		[19287-45-7]	0.1	0.11
Dibromodifluoromethane			See Diflurodibromomethane
1,2-Dibromoethane		[106-93-4]	20	155			Pc,C2,RP,EM
Dibrom®			See Naled
Dibutyl phenyl phosphate		[2528-36-1]	0.3	3.5			Pc
Dibutyl phosphate		[107-66-4]		5			Pc,IFV
Dibutyl phthalate		[84-74-2]		5
2-N-Dibutylaminoethanol		[102-81-8]	0.5				Pc
3,3’-Dichloro-4,4’-diamino-diphenylmethane			See 4,4’-Methylene bis (2-chloroaniline)
1,3-Dichloro-5,5-dimethyl hydantoin		[118-52-5]		0.2		0.4
Dichloroacetylene		[7572-29-4]			C0.1		C3,RP
o-Dichlorobenzene		[95-50-1]	25		50
p-Dichlorobenzene		[106-46-7]	10				C3
3,3’-Dichlorobenzidine		[91-94-1]	Without applicable permissible exposure value				Pc,C2,RP,EM
1,4-Dichloro-2-butene		[764-41-0]	0.005	0.025			Pc,C2,EM
Dichlorodifluoromethane		[75-71-8]	1000	4950
3,5-Dichloro-2,6-dimethyl-4 pyridinol			See Clopidol
Dichlorodiphenyltrichloroethane			See DDT
1,1-Dichloroethane		[75-34-3]	100	405
1,2-Dichloroethane		[107-06-2]	1	4	2	8	C2,EM
Dichloroethyl ether		[111-44-4]	5	29	10	58	Pc
1,1-Dichloroethylene		[75-35-4]	1	4
1,2-Dichloroethylene		[540-59-0]	200	793
Dichlorofluoromethane		[75-43-4]	10	42
Dichloromethane			See Methylene chloride
1,1-Dichloro-1-nitroethane		[594-72-9]	2	12
(2,4-Dichlorophenoxy) acetic acid			See 2.4-D
1,2-Dichloropropane		[78-87-5]	10				S(D)
Dichloropropene (cis and trans isomers)		[542-75-6]	1	4.5			Pc,C3
2,2-Dichloropropionic acid		[75-99-0]		5			Id
1,2-Dichloro-1,1,2,2-tetrafluoroethane		[76-14-2]	1000	6990
Dichlorvos		[62-73-7]		0.1			Pc,S(D),IVF
Dicrotophos		[141-66-2]		0.05			Pc,IVF
4,4’-Dicyclohexyl methane diisocyanate			See Methylene bis (4-cyclohexylisocyanate)
Dicyclopentadiene and cyclopentadiene		[77-73-6]; [542‑92‑7]	0.5
Dicyclopentadienyl iron		[102-54-5]		10
Dieldrin		[60-57-1]		0.1			C3,Pc,IFV
Diesel (fuel), (as total hydrocarbons)		[68334-30-5]
		[68476-34-6]
		[77650-28-3]
		[68476-30-2]
		[68476-31-3]		100			C3,Pc,IFV
Diethanolamine		[111-42-2]		1			C3,Pc,IFV
Diethyl ether		[60-29-7]	400	1210	500	1520
Diethyl ketone		[96-22-0]	200		300
Diethyl phthalate		[84-66-2]		5
Diethylamine		[109-89-7]	5	15	15	45	Pc
2-Diethylaminoethanol		[100-37-8]	2				Pc
Diethylene triamine		[111-40-0]	1	4.2			Pc
Di(2-ethylhexyl) phthalate			See Di-sec-octyl phthalate
Difluorodibromomethane		[75-61-6]	100	858
Diglycidyl ether (DGE)		[2238-07-5]	0.01
Dihydroxybenzene			See Hydroquinone
Diisobutyl ketone		[108-83-8]	25	145
1,6-Diisocyanatohexane			See Hexamethylene diisocyanate
Diisopropyl ether		[108-20-3]	250	1040	310	1300
Diisopropylamine		[108-18-9]	5	21			Pc
Dimethoxymethane			See Methylal
Dimethyl carbamoyl chloride		[79-44-7]	Without applicable permissible exposure value				C2,RP,EM
Dimethyl sulfate		[77-78-1]	0.1	0.52			Pc,C2,RP,EM
2,6-Dimethyl-4-heptanone			See Diisobutyl ketone
N,N-Dimethylacetamide		[127-19-5]	10				Pc,C3
Dimethylamine		[124-40-3]	5		15		S(D)
Dimethylaminobenzene			See Xylidine
N,N-Dimethylaniline		[121-69-7]	5	25	10	50	Pc
Dimethylbenzene			See Xylene
N,N-Dimethylformamide		[68-12-2]	5				Pc,C3
1,1-Dimethylhydrazine		[57-14-7]	0.01				C3,Pc
Dimethylnitrosoamine			See N-Nitrosodimethylamine
Dimethylphthalate		[131-11-3]		5
Dinitolmide		[148-01-6]		1
Dinitro-ortho-cresol		[534-52-1]		0.2			Pc,IFV
3,5-Dinitro-ortho-toluamide			See Dinitolmide
Dinitrobenzene (all isomers)		[99-65-0];	0.15				Pc,IFV
		[100-25-4];
		[528-29-0];
		[25154-54-5]
Dinitrotoluene		[25321-14-6]		0.2			Pc,C3
Dioxane		[123-91-1]	20	72			Pc,C3
Dioxathion		[78-34-2]		0.1			Pc,IVF
1,3-Dioxolane		[646-06-0]	20
Diphenyl			See Biphenyl
Diphenyl ether			See Phenyl ether
Diphenylamine		[122-39-4]		10
4,4’-Diphenylmethane diisocyanate (MDI)			See Methylene bis (4-phenyl isocyanate)
Dipropyl ketone		[123-19-3]	50
Dipropylene glycol monomethyl ether		[34590-94-8]	100	606	150	909	Pc
Diquat, as cation		[2764-72-9];		0.5			Id, Pc
		[85-00-7];
		[6385-62-2]
				0.1			Rd,Pc
Disulfiram		[97-77-8]		2
Disulfoton		[298-04-4]		0.05			Pc,IVF
Disyston®			See Disulfoton
Diuron		[330-54-1]		10
Divinyl benzene		[1321-74-0]	10	53
Dursban®			See Chlorpyrifos
Dust, inert or nuisance particulates			See Particulates Not Otherwise Classified (PNOC)
Dyfonate®			See Fonofos
Endosulfan		[115-29-7]		0.1			Pc,IVF
Endrin		[72-20-8]		0.1			Pc
Enflurane		[13838-16-9]	75	566
Enzymes, proteolytic			See Subtilisins
Epichlorohydrin		[106-89-8]	2	7.6			Pc,C2,PR,EM
EPN		[2104-64-5]		0.1			Pc,Id
2,3-Epoxy-1-propanol			See Glycidol
1,2-Epoxypropane			See Propylene oxide
Erionite			See Fibres-Natural Mineral Fibres
Ethane		[74-84-0]	Simple asphyxiant				EX
Ethanethiol			See Ethyl mercaptan
Ethanol			See Ethyl alcohol
Ethanolamine			See 2-Aminoethanol
Ethion		[563-12-2]		0.05			Pc,IVF
2-Ethoxyethanol (EGEE)		[110-80-5]	5	18			Pc
2-Ethoxyethyl acetate (EGEEA)		[111-15-9]	5	27			Pc
Ethyl acetate		[141-78-6]	400	1440
Ethyl acrylate		[140-88-5]	5	20	15	61	C3,S
Ethyl alcohol		[64-17-5]			1000		C3
Ethyl amyl ketone		[541-85-5]	10
Ethyl benzene		[100-41-4]	20				C3
Ethyl bromide		[74-96-4]	5				Pc,C3
Ethyl butyl ketone		[106-35-4]	50		75
Ethyl chloride		[75-00-3]	100				C3,Pc
Ethyl ether			See Diethyl ether
Ethyl formate		[109-94-4]	100	303
Ethyl isocyanate		[109-90-0]	0.02		0.06		S(D),Pc
Ethyl mercaptan		[75-08-1]	0.5	1.3
Ethyl silicate		[78-10-4]	10	85
Ethylamine		[75-04-7]	5		15		Pc
Ethylene		[74-85-1]	200
Ethylene bromide			See Vinyl bromide
Ethylene chlorohydrin		[107-07-3]			C1	C3.3	Pc,RP
Ethylene dibromide			See 1,2-Dibromoethane
Ethylene dichloride			See 1,2-Dichloroethane
Ethylene glycol (vapour and mist)		[107-21-1]			C50	C127	RP
Ethylene glycol dinitrate		[628-96-6]	0.05				Pc
Ethylene glycol monoethyl ether			See 2-Ethoxyethanol
Ethylene glycol monoethyl ether acetate			See 2-Ethoxyethyl acetate
Ethylene glycol monomethyl ether			See 2-Methoxyethanol
Ethylene glycol monomethyl ether acetate			See 2-Methoxyethyl acetate
Ethylene imine		[151-56-4]	0.05		0.1		C3,Pc
Ethylene oxide		[75-21-8]	1	1.8			C2,RP,EM
Ethylenediamine		[107-15-3]	10	25			Pc, S
Ethylglycol acetate			See 2-Ethoxyethyl acetate
Ethylidene chloride			See 1,1-Dichloroethane
Ethylidene norbornene		[16219-75-3]	2		4
N-Ethylmorpholine		[100-74-3]	5	24			Pc
Fenamiphos		[22224-92-6]		0.05			Pc,IVF
Fensulfothion		[115-90-2]		0.01			Pc,IVF
Fenthion		[55-38-9]		0.05			Pc,IVF
Ferbam		[14484-64-1]		5			Id
Ferrovanadium (dust)		[12604-58-9]		1		3
Fibres-Artificial vitreous mineral fibres				1 fibre/cm3			Note 4
	Continuous filament glass fibres				5		Pi
Fibres-Natural Mineral Fibres (note 4)
	Attapulgite	[12174-11-7]		1 fibre/cm3			C1,EM
	Erionite	[66733-21-9]		Prohibited use			C1
	Talc		See Talc (fibrous)
	Wollastonite	[13983-17-0]		10			Td, note 1
				5			Rd, note 1
Fibres-Organic Synthetic Fibres				10			Td, note 1
	Carbon and graphite fibres			5			Rd, note 1
	Polyolefines fibres			10			Td, note 1
Fibrous glass dust			See Fibres-Artificial Vitreous Mineral Fibres
Flour dust				3			Id,S(R)
Fluorides (as F)				2.5
Fluorine (as F)		[7782-41-4]	0.1		P0.5
Fluorotrichloromethane			See Trichlorofluoromethane
Fonofos		[944-22-9]		0.1			Pc,IVF
Formaldehyde		[50-00-0]			P1.5		C2,EM,RP, S(D),S(R)
Formamide		[75-12-7]	1				Pc,C3
Formic acid		[64-18-6]	5	9.4	10	19
Formic aldehyde			See Formaldehyde
Freon® 11			See Trichlorofluoromethane
Freon® 112			See 1,1,1,2-Tetrachloro-1,2-difluoroethane
Freon® 113			See 1,1,2-Trichloro-1,2,2-trifluoroethane
Freon® 114			See 1,2-Dichloro-1,1,2,2-tetrafluoroethane
Freon® 115			See Chloropentafluoroethane
Freon® 12			See Dichlorodifluoromethane
Freon® 12B2			See Difluorodibromomethane
Freon® 21			See Dichlorofluoromethane
Freon® 22			See Chlorodifluoromethane
Furadan®			See Carbofuran
Furfural		[98-01-1]	0.2				Pc,C3
Furfuryl alcohol		[98-00-0]	0.2				Pc,C3
Gasoline		[8006-61-9]	300	890	500	1480	C3
Germanium tetrahydride		[7782-65-2]	0.2	0.63
Glass wool			See Fibres-Artificial Vitreous Mineral Fibres
Glass, fibrous or dust			See Fibres-Artificial Vitreous Mineral Fibres
Glutaraldehyde		[111-30-8]			P0.05		RP,S(D),S(R)
Glycerin (mist)		[56-81-5]		10
Glycidol		[556-52-5]	2				C3
Glycol monoethyl ether			See 2-Ethoxyethanol
Grain dust (oat, wheat, barley)				4			Td, note 1
Graphite (all forms except fibers)		[7782-42-5]		2			Rd, note 1
Graphite (fibres)			See Fibres-Organic Synthetic Fibres
Guthion®			See Azinphos-methyl
Gypsum			See Calcium sulfate
Hafnium		[7440-58-6]		0.5
Halothane		[151-67-7]	50	404
Hard metals containing cobalt and tungsten carbide, as cobalt				0.005			C2,RP,EM, S(R),Thord
Helium		[7440-59-7]	Simple asphyxiant
Heptachlor		[76-44-8]		0.05			Pc,C3
Heptachlor epoxide		[1024-57-3]		0.05			Pc,C3
Heptane (all isomers)		[108-08-7]
		[142-82-5]
		[565-59-3]
		[589-34-4]
		[590-35-2]
		[591-76-4]	400		500
2-Heptanone			See Methyl n-amyl ketone
3-Heptanone			See Ethyl butyl ketone
Hexachlorobenzene		[118-74-1]		0.002			C3,Pc
Hexachlorobutadiene		[87-68-3]	0.02	0.21			Pc,C2,RP,EM
Hexachlorocyclopentadiene		[77-47-4]	0.01	0.11
Hexachloroethane		[67-72-1]	1	9.7			Pc,C3
Hexachloronaphthalene		[1335-87-1]		0.2			Pc
Hexafluoroacetone		[684-16-2]	0.1	0.68			Pc
Hexafluoropropylene		[116-15-4]	0.1
Hexamethylenetetramine		[100-97-0]		1			S(D),IFV
Hexamethylphosphoramide		[680-31-9]	Without applicable permissible exposure value				Pc,C2,RP,EM
Hexamethylene diisocyanate		[822-06-0]	0.005	0.034			EM,S
n-Hexane		[110-54-3]	50	176			Pc
Hexane (other isomers)			500	1760	1000	3500
2-Hexanone			See Methyl n-butyl ketone
Hexazinone		[51235-04-2]		3			Pi
1-Hexene		[592-41-6]	50
Hexone			See Methyl isobutyl ketone
sec-Hexyl acetate		[108-84-9]	20		50
Hexylene glycol		[107-41-5]			C25	C121	RP
Hydrazine		[302-01-2]	0.1	0.13			Pc,C2,RP,EM
Hydrogen		[1333-74-0]	Simple asphyxiant
Hydrogen bromide		[10035-10-6]			C2		RP
Hydrogen chloride		[7647-01-0]			C2		RP
Hydrogen cyanide		[74-90-8]			P4.7		Pc
Hydrogen fluoride (as F)		[7664-39-3]	0.5		3		Pc,RP
Hydrogen peroxide		[7722-84-1]	1				C3
Hydrogen selenide (as Se)		[7783-07-5]	0.05	0.16
Hydrogen sulfide		[7783-06-4]	8		P10
Hydrogenated terphenyls		[61788-32-7]	0.5	4.9
Hydroquinone		[123-31-9]		1			C3, S(D)
Hydroquinone monomethyl ether			See 4-Methoxyphenol
4-Hydroxy-4methyl-2-pentanone			See Diacetone alcohol
2-Hydroxypropyl acrylate		[999-61-1]	0.5				Pc, S(D)
2,2’-Iminodiethanol			See Diethanolamine
Indene		[95-13-6]	5
Indium and compounds (as In)		[7440-74-6]		0.1
Indium tin oxide (as In)		[50926-11-9]		0.0001			Pr,C3,S(D)
Insulation wool fibres			See Fibres-Artificial Vitreous Mineral Fibres
Iodide			0.01				IFV
Iodine		[7553-56-2]	0.01		0.1		IFV
Iodoform		[75-47-8]	0.6	10
Iodomethane			See Methyl iodide
Iron dicyclopentadienyl			See Dicyclopentadienyl iron
Iron pentacarbonyl (as Fe)		[13463-40-6]	0.1	0.23	0.2	0.45
Iron salts, soluble (as Fe)				1.0
Iron trioxide, dust and fume (as Fe)		[1309-37-1]		5
Isoamyl alcohol		[123-51-3]	100	361	125	452
Isobutane		[75-28-5]			1000
Isobutyl alcohol		[78-83-1]	50	152
Isocyanate oligomers			Without applicable permissible exposure value				S
Isooctyl alcohol		[26952-21-6]	50	266			Pc
Isophorone		[78-59-1]			C5		RP,C3
Isophorone diisocyanate		[4098-71-9]	0.005	0.045			EM,S
Isopropoxyethanol		[109-59-1]	25	106			Pc
Isopropyl alcohol		[67-63-0]	200		400
Isopropyl ether			See Diisopropyl ether
Isopropyl glycidyl ether (IGE)		[4016-14-2]	50	238	75	356
Isopropylamine		[75-31-0]	2		5		Pc
N-Isopropylaniline		[768-52-5]	2	11			Pc
Isopropylbenzene			See Cumene
Kaolin		[1332-58-7]		2			Rd, note 1
Kerosene		[8008-20-6; 64742-81-0]		200			C3,Pc
Ketene		[463-51-4]	0.5	0.86	1.5	2.6
L.P.G. (Liquified petroleum gas)		[68476-85-7]	Simple asphyxiant				EX
Lead [7439-92-1], and inorganic compounds, (as Pb)				0.05			C3
Lead arsenate (as Pb3(AsO4)2)		[3687-31-8]	See Lead and its inorganic compounds and Arsenic and its inorganic compounds
Lead tetraethyl (as Pb)		[78-00-2]		0.05			Pc
Lead tetramethyl (as Pb)		[75-74-1]		0.05			Pc
Limestone		[1317-65-3]		10			Td, note 1
Lindane		[58-89-9]		0.5			C3,Pc
Lithium hydride		[7580-67-8]				C0.05	Id
Magnesite		[546-93-0]		10			Td, note 1
Magnesium oxide		[1309-48-4]		10			Id
Malathion		[121-75-5]		1			Pc,IVF
Maleic anhydride		[108-31-6]		0.01			IVF, S(D),S(R)
Manganese cyclopentadienyl tricarbonyl (as Mn)		[12079-65-1]		0.1			Pc
Manganese - Fumes, dust and compounds (as Mn) (inhalable)		[7439-96-5]		0.2			Pi
Manganese - Fumes, dust and compounds (as Mn) (respirable)		[7439-96-5]		0.05			Pr
Manganese methyl cyclopentadienyl tricarbonyl (as Mn)		[12108-13-3]		0.2			Pc
Marble			See Limestone
Mequinol			See 4-Methoxyphenol
Mercury [7439-97-6], alkyl compounds (as Hg)				0.01		0.03	Pc
Mercury [7439-97-6], aryl compounds (as Hg)				0.1			Pc
Mercury [7439-97-6], inorganic compounds (as Hg)				0.025			Pc
Mercury [7439-97-6], mercury vapor (as Hg)				0.025			Pc
Mesityl oxide		[141-79-7]	15		25
Methacrylic acid		[79-41-4]	20	70
Methane		[74-82-8]	Simple asphyxiant
Methanethiol			See Methyl mercaptan
Methanol			See Methyl alcohol
Methomyl		[16752-77-5]		0.2			Pc,IVF
Methoxychlor		[72-43-5]		10
2-Methoxyethanol (EGME)		[109-86-4]	0.1				Pc
2-Methoxyethyl acetate		[110-49-6]	0.1				Pc
4-Methoxyphenol		[150-76-5]		5
1-Methoxy-2-propanol			See Propylene glycol monomethyl ether
Methyl acetate		[79-20-9]	200	606	250	757
Methyl acetylene		[74-99-7]	1000	1640
Methyl acetylene-propadiene mixture (MAPP)		[59355-75-8]	1000	1640	1250	2050
Methyl acrylate		[96-33-3]	2				Pc, S(D)
Methyl alcohol		[67-56-1]	200	262	250	328	Pc
Methyl amyl alcohol		[108-11-2]	20		40
Methyl n-amyl ketone		[110-43-0]	50	233
Methyl bromide		[74-83-9]	1				Pc
Methyl tert-butyl ether		[1634-04-4]	40	144
Methyl n-butyl ketone		[591-78-6]	5		10		Pc
Methyl cellosolve®			See 2-Methoxyethanol
Methyl cellosolve® acetate			See 2-Methoxyethyl acetate
Methyl chloride		[74-87-3]	50	103	100	207	Pc
Methyl chloroform		[71-55-6]	350	1910	450	2460
Methyl 2-cyanoacrylate		[137-05-3]	0.2
Methyl demeton		[8022-00-2]		0.05			Pc,IVF
Methyl ethyl ketone (MEK)		[78-93-3]	50	150	100	300
Methyl ethyl ketone peroxide		[1338-23-4]			C0.2	C1.5	RP
Methyl formate		[107-31-3]	50		100		Pc
Methyl glycol			See 2-Methoxyethanol
Methyl glycol acetate			See 2-Methoxyethyl acetate
Methyl hydrazine		[60-34-4]	0.01				C3,Pc
Methyl iodide		[74-88-4]	2	12			Pc,C2,EM
Methyl isoamyl ketone		[110-12-3]	20		50
Methyl isobutyl carbinol			See Methyl amyl alcohol
Methyl isobutyl ketone		[108-10-1]	20		75		C3
Methyl isocyanate		[624-83-9]	0.02		0.06		Pc,S(D)
Methyl isopropyl ketone		[563-80-4]	20
Methyl mercaptan		[74-93-1]	0.5	0.98
Methyl methacrylate (monomer)		[80-62-6]	50		100		S(D)
Methyl parathion		[298-00-0]		0.02			Pc,IVF
Methyl propyl ketone		[107-87-9]			150
1-Methyl naphthalene		[90-12-0]	0.5				Pc
2-Methyl naphthalene		[91-57-6]	0.5				Pc
Methyl silicate		[681-84-5]	1	6
α-Methyl styrene		[98-83-9]	10				C3
Methylacrylonitrile		[126-98-7]	1	2.7			Pc
Methylal		[109-87-5]	1000	3110
Methylamine		[74-89-5]	5		15
N-Methylaniline		[100-61-8]	0.5	2.2			Pc
Methylcyclohexane		[108-87-2]	400	1610
Methylcyclohexanol		[25639-42-3]	50	234
o-Methylcyclohexanone		[583-60-8]	50	229	75	344	Pc
Methylene chloride		[75-09-2]	50	174			C2,EM
4,4’-Methylene bis (2-chloroaniline) (MOCA)		[101-14-4]	0.01				Pc,C2,IFV
Methylene bis (4-cylohexylisocyanate)		[5124-30-1]	0.005	0.054			EM,S
4,4’-Methylene dianiline		[101-77-9]	0.1	0.81			Pc,C2,EM
Methylene bis (4-phenyl isocyanate) (MDI)		[101-68-8]	0.005	0.051			EM,S
5-Methyl-3-heptanone			See Ethyl amyl ketone
Methyltetrahydrophthalic anhydride (isomers)		[3425-89-6];	0.00007		0.0003		Pc,S(D),S(R)
		[5333-84-6];
		[11070-44-3];
		[19438-63-2];
		[19438-64-3];
		[26590-20-5];
		[42498-58-8]
N-Methyl-2,4,6-Trinitrophenyl nitramine			See Tetryl
Metribuzin		[21087-64-9]		5
Mevinphos®			See Phosdrin
Mica		[12001-26-2]		0.1			Pr
Microfibres (fibrous glass)			See Fibres-Artificial Vitreous Mineral Fibres
Mineral oil (mist)
	Little or unrefined		Without applicable permissible exposure value				C2,EM,RP
	Pure, highly and ultra-refined			5			Id
Mineral wool fibres			See Fibres-Artificial Vitreous Mineral Fibres
Molybdenum (as Mo)
	Metal [7439-98-7] and insoluble compounds			10			Id
	Metal [7439-98-7] and insoluble compounds			3			Rd
	Soluble compounds			0.5			C3,Rd
Monocrotophos		[6923-22-4]		0.05			Pc,IVF
Monomethylformamide		[123-39-7]	1				Pc
Morpholine		[110-91-8]	20	71			Pc
Naled (Dibrom®)		[300-76-5]		0.1			Pc,S(D),IVF
Naphtha			See VM&P Naphtha
Naphthalene		[91-20-3]	10				C3,Pc
ß-Naphthylamine		[91-59-8]	Without applicable permissible exposure value				C1,RP,EM
α-Naphthylthiourea			See ANTU
Nemacur®			See Fenamiphos
Neon		[7440-01-9]	Simple asphyxiant
Nialate®			See Ethion
Nickel and inorganic compounds		[7440-02-0]
	Metal			1.5			Id
	Insoluble compounds (as Ni)			0.2			Id,C1,EM,RP
	Soluble compounds (as Ni)			0.1			Id
	Nickel subsulfide	[12035-72-2]		3			Id,C1,EM,RP
Nickel carbonyl (as Ni)		[13463-39-3]		0.001	0.007
Nicotine		[54-11-5]		0.5			Pc
Nitrapyrin		[1929-82-4]		10		20	IFV
Nitric acid		[7697-37-2]	2	5.2	4	10
Nitric oxide			See Nitrogen monoxide
p-Nitroaniline		[100-01-6]		3			Pc
Nitrobenzene		[98-95-3]	1				C3,Pc
p-Nitrochlorobenzene		[100-00-5]	0.1				C3,Pc
4-Nitrodiphenyl		[92-93-3]	Without applicable permissible exposure value				Pc,C1,RP,EM
Nitroethane		[79-24-3]	100	307
Nitrogen		[7727-37-9]	Simple asphyxiant
Nitrogen dioxide		[10102-44-0]	3		5
Nitrogen monoxide		[10102-43-9]	25	31
Nitrogen trifluoride		[7783-54-2]	10	29
Nitroglycerin		[55-63-0]	0.05				Pc
Nitromethane		[75-52-5]	20				C3
1-Nitropropane		[108-03-2]	25	91
2-Nitropropane		[79-46-9]	10	36			C2,RP,EM
N-Nitrosodimethylamine		[62-75-9]	Without applicable permissible exposure value				Pc,C2,RP,EM
Nitrotoluene (all isomers)		[88-72-2]
		[99-08-1]
		[99-99-0]
		[1321-12-6]	2				Pc
Nitrotrichloromethane			See Chloropicrin
Nitrous oxide		[10024-97-2]	50	90
Nonane		[111-84-2]	200	1050
Nuisance particulates			See Particulates Not Otherwise Classified (PNOC)
Octachloronaphthalene		[2234-13-1]		0.1		0.3	Pc
Octane (all isomers)		[111-65-9]	300
Oil mist, mineral			See Mineral oil (mist)
Osmium tetroxide (as Os)		[20816-12-0]	0.002	0.0016	0.0006	0.0047
Oxalic acid		[144-62-7]		1		2
Oxygen difluoride		[7783-41-7]			C0.05	C0.11	RP
Ozone		[10028-15-6]			C0.1	C0.2	RP
Para-aramides fibres			See Fibres-Organic Synthetic Fibres
Paraffin wax, fume		[8002-74-2]		2
Paraquat, as cation		[4685-14-7]		0.5
				0.1			Rd
Parathion		[56-38-2]		0.05			Pc,IVF
Particulate polycyclic aromatic hydrocarbons (PPAH)			See Coal tar pitch volatiles
Particulates Not Otherwise Classified (PNOC)			See Part 1.1
Pentaborane		[19624-22-7]	0.005	0.013	0.015	0.039
Pentachloronaphthalene		[1321-64-8]		0.5			Pc, IFV
Pentachloronitrobenzene		[82-68-8]		0.5
Pentachlorophenol		[87-86-5]		0.5			Pc,C2,RP,EM
Pentaerythritol		[115-77-5]		10
Pentane (all isomers)		[109-66-0]
		[463-82-1]
		[78-78-4]	1000
2-Pentanone			See Methyl propyl ketone
3-Pentanone			See Diethyl ketone
Pentyl acetate (all isomers)		[123-92-2]
		[620-11-1]
		[624-41-9]
		[625-16-1]
		[626-38-0]
		[628-63-7]	50		100
Peracetic acid		[79-21-0]			0.4		IFV
Perchloroethylene		[127-18-4]	25	170	100	685	C3
Perchloromethyl mercaptan		[594-42-3]	0.1	0.76
Perchloryl fluoride		[7616-94-6]	0.5
Perfluorodimethylcetone			See Hexafluoroacetone
Perfluoroisobutylene		[382-21-8]			C0.01	C0.082	RP
Perlite		[83969-76-0]		10			Td, note 1
				5			Rd, note 1
Petroleum distillates			See Gasoline, Stoddard solvent, VM&P Naphtha
Phenacyl chloride			See α-Chloroacetophenone
Phenol		[108-95-2]	5	19			Pc
Phenothiazine		[92-84-2]		5			Pc
Phenyl ether, vapour		[101-84-8]	1	7	2	14
Phenyl glycidyl ether (PGE)		[122-60-1]	0.1				Pc,S(D),C3
Phenyl isocyanate		[103-71-9]	0.005		0.015		S(D),S(R),Pc
Phenyl mercaptan		[108-98-5]	0.1				Pc
meta-Phenylenediamine		[108-45-2]		0.1
ortho-Phenylenediamine		[95-54-5]		0.1			C2,EM
para-Phenylenediamine		[106-50-3]		0.1			Pc,S
Phenylethylene			See Styrene (monomer)
Phenylhydrazine		[100-63-0]	0.1	0.44			Pc,C2,RP,EM
N-Phenyl-ß-naphthylamine		[135-88-6]	Without applicable permissible exposure value				C2,RP,EM
Phenylphosphine		[638-21-1]			C0.05	C0.23	RP
Phorate		[298-02-2]		0.05			Pc,IVF
Phosdrin		[7786-34-7]		0.01			Pc,IVF
Phosgene		[75-44-5]	0.1	0.40
Phosphine		[7803-51-2]		0.05		P0.15
Phosphoric acid		[7664-38-2]		1		3
Phosphorus (yellow)		[12185-10-3]		0.1
Phosphorus oxychloride		[10025-87-3]	0.1	0.63
Phosphorus pentachloride		[10026-13-8]	0.1	0.85
Phosphorus pentasulfide		[1314-80-3]		1		3
Phosphorus trichloride		[7719-12-2]	0.2	1.1	0.5	2.8
Phthalic anhydride		[85-44-9]		0.002		0.005	Pc,S(D),S(R),IFV
m-Phthalodinitrile		[626-17-5]		5			IFV
Picloram		[1918-02-1]		10
Picric acid		[88-89-1]		0.1			S
Pindone		[83-26-1]		0.1
Piperazine and salts, as piperazine		[110-85-0]	0.03				S(D), S(R),IFV
Plaster of Paris			See Calcium sulfate
Platinum		[7440-06-4]
	Metal			1			S
	Soluble salts (as Pt)			0.002			S
Polychlorobiphenyls			See Chlorodiphenyl
Polyolefines fibres			See Fibres-Organic Synthetic Fibres
Polytetrafluoroethylene decomposition products		[9002-84-0]	Determine quantitatively the decomposition products in the air and express the results as Fluorides (see Fluorides standards)
Portland cement		[65997-15-1]		1			S,Rd, note 1
Potassium hydroxide		[1310-58-3]				C2	RP,EM
Precipitated silica			See Silica - Amorphous, precipitated
Propane		[74-98-6]	Simple asphyxiant				EX
Propane sultone		[1120-71-4]	Without applicable permissible exposure value				C2,RP,EM
Propanol			See n-Propyl alcohol
Propargyl alcohol		[107-19-7]	1	2.3			Pc
ß-Propiolactone		[57-57-8]	0.5	1.5			C2,RP,EM
Propionaldehyde		[123-38-6]	20
Propionic acid		[79-09-4]	10	30
Propoxur		[114-26-1]		0.5			C3,IFV
Propyl acetate (isomers)		[108-21-4];	100		150
		[109-60-4]
n-Propyl alcohol		[71-23-8]	100
n-Propyl nitrate		[627-13-4]	25	107	40	172
Propylene		[115-07-1]	500
Propylene dichloride			See 1,2-Dichloropropane
Propylene glycol dinitrate		[6423-43-4]	0.05	0.34			Pc
Propylene glycol ethyl ether		[1569-02-4]	50		200		Pc
Propylene glycol monomethyl ether		[107-98-2]		50		100
Propylene imine		[75-55-8]	0.2		0.4		C3,Pc
Propylene oxide		[75-56-9]					C3,S(D)
Propyne			See Methyl acetylene
Propyne-Propadiene mixture			See Methyl acetylene-propadiene mixture (MAPP)
Pyrethrum		[8003-34-7]		5
Pyridine		[110-86-1]	1				C3
Pyrocatechol			See Catechol
Quartz			See Silica - Crystalline, Quartz
Quinone			See p-Benzoquinone
RDX			See Cyclonite
Refractory fibres			See Fibres-Artificial Vitreous Mineral Fibres
Resin acids		[8050-09-7]		0.001			Pi, S(D),S(R)
Resorcinol		[108-46-3]	10	45	20	90
Rhodium		[7440-16-6]
	Metal and insoluble compounds (as Rh)			0.1
	Soluble compounds (as Rh)			0.001
Rock wool			See Fibres-Artificial Vitreous Mineral Fibres
Ronnel		[299-84-3]		5			IVF
Rotenone		[83-79-4]		5
Rubber solvent (Naphtha)		[8030-30-6]		1000
Selenium [7782-49-2] and compounds (as Se)				0.2
Selenium hexafluoride (as Se)		[7783-79-1]	0.05	0.16
Sencor®			See Metribuzin
N-Serve®			See Nitrapyrin
Sesone		[136-78-7]		10
Sevin®			See Carbaryl
Silane			See Silicon tetrahydride
Silica cristalline, cristobalite		[14464-46-1]		0.05			Rd,C2,EM
Silica – Crystalline/Tripoli		[14808-60-7]		0.05			Rd,C2,EM
		[1317-95-9]
Silicon		[7440-21-3]		10			Td, note 1
Silicon carbide (non fibrous)		[409-21-2]		10			Td, note 1
				3			Rd, note 1
							RP
Silicon tetrahydride		[7803-62-5]	5	6.6
Silver		[7440-22-4]
	Metal			0.1
	Soluble compounds (as Ag)			0.01
Simazine		[122-34-9]		0.5			C3, Id
Slag wool			See Fibres-Artificial Vitreous Mineral Fibres
Sodium azide
	Sodium azide	[26628-22-8]				C0.29
	Hydrazoic acid vapour				C0.11
Sodium bisulfite		[7631-90-5]		5
Sodium 2,4-dichlorophenoxyethyl sulfate			See Sesone
Sodium fluoroacetate		[62-74-8]		0.05		0.15	Pc
Sodium hydroxide		[1310-73-2]				C2	RP
Sodium metabisulfite		[7681-57-4]		5
Starch		[9005-25-8]		10			Td, note 1
Stearates		[57-11-4];		10			J;Pi
		[557-04-0];
		[557-05-1];
		[822-16-2]
				3			J;Pr
Stibine (as Sb)		[7803-52-3]	0.1	0.51
Stoddard solvent		[8052-41-3]	100	525
Strontium chromate (as Cr)		[7789-06-2]		0.0005			C2,RP,EM
Strychnine		[57-24-9]		0.15
Styrene (monomer)		[100-42-5]		50	75
Subtilisins (Proteolytic enzymes as 100% pure crystalline enzyme)		[1395-21-7]
		[9014-01-1]			C0.00006		S,RP
Succinaldehyde		[638-37-9]	1	4			Pc
Sucrose		[57-50-1]		10
Sulfometuron methyl		[74222-97-2]		5			Pc
Sulfotep		[3689-24-5]		0.1			Pc,IVF
Sulfur dioxide		[7446-09-5]	2	5.2	5	13
Sulfur hexafluoride		[2551-62-4]	1000	5970
Sulfur monochloride		[10025-67-9]			C1	C5.5	RP
Sulfur pentafluoride		[5714-22-7]			C0.01	C0.1	RP
Sulfur tetrafluoride		[7783-60-0]			C0.1	C0.44	RP
Sulfuric acid		[7664-93-9]		0.2		3	Thord, RP,EM(C2 for strong acid mist)
Sulfuryl fluoride		[2699-79-8]	5	21	10	42
Sulprofos		[35400-43-2]		0.1			Pc,IVF
Systox			See Demeton®
2,4,5-T		[93-76-5]		10			C2,RP,EM
Talc, fibrous (note 4)				1 fibre/cm3			C1,EM
Talc, non fibrous		[14807-96-6]		2			Rd,note 1
Tantalum [7440-25-7], metal and oxide dusts (as Ta)				5
TEDP			See Sulfotep
Tellurium [13494-80-9] and compounds (as Te)				0.1
Tellurium hexafluoride (as Te)		[7783-80-4]	0.02	0.10
Temephos		[3383-96-8]		1			Pc,IVF
TEPP		[107-49-3]		0.01			Pc,IVF
Terbufos		[13071-79-9]		0.01			Pc,IVF
Terephthalic acid		[100-21-0]		10
Terphenyls		[26140-60-3]			C0.53	C5	RP
Tert-Amyl methyl ether [TAME]		[994-05-8]	20
1,1,2,2-Tetrabromoethane (Acetylene tetrabromide)		[79-27-6]	0.1
1,1,1,2-Tetrachloro-2,2-difluoroethane		[76-11-9]	100
1,1,2,2-Tetrachloro-1,2-difluoroethane		[76-12-0]	50
1,1,2,2-Tetrachloroethane (Acetylene tetrachloride)		[79-34-5]	1				C3,Pc
Tetrachloroethylene			See Perchloroethylene
Tetrachloromethane			See Carbon tetrachloride
Tetrachloronaphthalene		[1335-88-2]		2
Tetraethyl lead			See Lead tetraethyl
Tetraethyl pyrophosphate			See TEPP
Tetrahydrofuran		[109-99-9]	50		100		C3,Pc
Tetramethyl lead			See Lead tetramethyl
Tetramethyl succinonitrile		[3333-52-6]		0.5			Pc,IFV
Tetranitromethane		[509-14-8]	0.005	0.04			C2,EM
Tetrasodium pyrophosphate		[7722-88-5]		5
Tetryl		[479-45-8]		1.5
TGIC			See Triglycidyl isocyanurate
Thallium [7440-28-0], and compounds (as Tl)				0.02			Pc,Id
Thimet®			See Phorate
4,4’-Thiobis (6-tert-butyl-m-cresol)		[96-69-5]		1			Id
Thiodan®			See Endosulfan
Thiodiphenylamine			See Phenothiazine
Thioglycolic acid		[68-11-1]	1	3.8			Pc
Thionyl chloride		[7719-09-7]			P0.2
Thiram®		[137-26-8]		0.05			S(D),IVF
Tin and its inorganic compounds [18282-10-5; 21651-19-4], (as Sn) (except stannane and indium tin oxide)		[7440-31-5]		2			Pi
Titanium dioxide		[13463-67-7]		10			Td, note 1
Titanium tetrachloride (as hydrogen chloride)		[7550-45-0]			P0.5
o-Tolidine		[119-93-7]	Without applicable permissible exposure value				Pc,C2,RP,EM
Toluene		[108-88-3]	20				OTO
Toluene diisocyanate (TDI) (isomers mixture)		[26471-62-5];	0.001		0.005		Pc, C3, S(D), S(R), IFV
		[584-84-9];
		[91-08-7]
o-Toluidine		[95-53-4]	2	8.8			Pc,C2,RP,EM
m-Toluidine		[108-44-1]	2	8.8			Pc
p-Toluidine		[106-49-0]	2	8.8			Pc,C2,EM
Toxaphene			See Chlorinated camphene
Tremolite			See Asbestos
Tribromomethane			See Bromoform
Tri-n-butyl phosphate		[126-73-8]		5			C3,IFV
Trichloroacetic acid		[76-03-9]	0.5				C3
1,2,4-Trichlorobenzene		[120-82-1]			C5	C37	RP
1,1,2-Trichloroethane		[79-00-5]	10				C3,Pc
1,1,1-Trichloroethane			See Methyl chloroform
Trichloroethylene		[79-01-6]	10		25		C2,RP,EM
Trichlorofluoromethane		[75-69-4]			C1000	C5620	RP
Trichloromethane			See Chloroform
Trichloronaphthalene		[1321-65-9]		5			Pc
Trichloronitromethane			See Chloropicrin
2,4,5-Trichlorophenoxyacetic acid			See 2,4,5-T
1,2,3-Trichloropropane		[96-18-4]	0.005				C2,EM,RP
1,1,2-Trichloro-1,2,2-trifluoroethane		[76-13-1]	1000	7670	1250	9590
Tri-o-cresyl phosphate		[78-30-8]		0.02			Pc,IFV
Tricyclohexyltin hydroxide			See Cyhexatin
Tridymite			See Silica - Crystalline
Triethanolamine		[102-71-6]		5			S
Triethylamine		[121-44-8]	0.5		1		Pc
Trifluorobromomethane			See Bromotrifluoromethane
Triglycidyl isocyanurate (TGIC) (alpha-)		[59653-73-5]		0.05
Triglycidyl isocyanurate (TGIC) (beta-)		[59653-74-6]		0.05
Triglycidyl isocyanurate (TGIC) (mixed isomers)		[2451-62-9]		0.05
Trimellitic anhydride		[552-30-7]		0.0005		0.002	Pc,S(D),S(R), IVF
Trimethyl benzene (mixed isomers)		[25551-13-7]	25				S
Trimethyl phosphite		[121-45-9]	2	10
Trimethylamine		[75-50-3]	5	12	15	36
2,4,6-Trinitrophenol			See Picric acid
2,4,6-Trinitrophenylmethylnitramine			See Tetryl
2,4,6-Trinitrotoluene (TNT)		[118-96-7]		0.1			Pc,IFV
Triphenyl amine		[603-34-9]		5
Triphenyl phosphate		[115-86-6]		3
Tripoli			See Silica - Crystalline
Tungsten and compounds, in the absence of Cobalt (as W)		[7440-33-7]	3				Pr
Turpentine and certain monoterpenes
	Turpentine	[8006-64-2]	20	112			S(D)
	∆-3 Carene	[13466-78-9]	20	112			S(D)
	α-Pinene	[80-56-8]	20	112			S(D)
	ß-Pinene	[127-91-3]	20	112			S(D)
Uranium (natural)
	soluble and insoluble compounds (as U)	[7440-61-1]		0.2		0.6	C1,RP,EM
n-Valeraldehyde		[110-62-3]	50	176
N-Vinyl-2-pyrrolidone		[88-12-0]	0.05				C3
Vanadium pentoxide (as V)		[1314-62-1]		0.05			C3,Id
Vegetable oil mists (except castor, cashew and other similar irritant oils)		[68956-68-3]		10
Vinyl acetate		[108-05-4]	10	35	15	53	C3
Vinyl benzene			See Styrene (monomer)
Vinyl bromide		[593-60-2]	0.5				C2,RP,EM
Vinyl chloride (monomer)		[75-01-04]	1	2.6			C1,RP,EM
Vinyl cyanide			See Acrylonitrile
Vinyl cyclohexene dioxide		[106-87-6]	0.1				C3,Pc
Vinyl toluene		[25013-15-4]	50	242	100	483
Vinylidene chloride			See 1,1-Dichloroethylene
VM&P Naphtha		[8032-32-4]	300	1370
Warfarin		[81-81-2]		0.01			Id,Pc
Welding fumes (not otherwise classified)				5
Wollastonite			See Fibres-Natural Mineral Fibres
Wood dust (western red cedar)				0.5			Pi,S(D),S(R)
Wood dust hard and soft, except red cedar				5			Td, note 1
Xylene (o-,m-,p- isomers)		[1330-20-7]
		[95-47-6]
		[108-38-3]
		[106-42-3]	100	434	150	651
m-Xylene-α ,α’diamine		[1477-55-0]				C0.1	Pc,RP
Xylidine (mixed isomers)		[1300-73-8]	0.5				C3,Pc,IFV
Yttrium [7440-65-5], metal and compounds (as Y)				1
Zinc chloride, fume		[7646-85-7]		1		2
Zinc, oxide		[1314-13-2]		2		10	Rd
Zirconium and compounds (as Zr)		[7440-67-7]		5		10
Zoalene®			See Dinitolmide

Part 1.1

PARTICULATES NOT OTHERWISE CLASSIFIED (PNOC):

Particulates present in the air that meet the following conditions are considered Particulates Not Otherwise Classified (PNOC) or nuisance particulates:

(1) no permissible exposure value is provided for them in Part 1 of Schedule I to this Regulation;

(2) they are insoluble or poorly soluble in water;

(3) their toxicity is low and they have no effect other than lung overload or mechanical irritation.

The permissible exposure values for such particulates are weighted average exposure values (WAEVs) of 10 mg/m3 in inhalable particulates (IP) and 3 mg/m3 in respirable particulates (RP).

Part 2

DAILY EXPOSURE TO A SPECIFIC SUBSTANCE OF A WORKER WORKING AT SEVERAL WORK LOCATIONS

Where a worker carries out his work at more than one work location during an 8-hour period, each exposure at those locations must be included in the evaluation of the daily average exposure value with respect to any substance listed in Parts 1 and 1.1 of this Schedule. The same applies when the worker performs his work at more than one work location for a period equal to or greater than 4 hours but less than 8 hours or a period greater than 8 hours but less than or equal to 16 hours.

For the purpose of evaluating average daily exposure, the method of computation prescribed in the following formula is used

Daily average exposure value:

(in mg/m3 or in ppm)

C1T1 + C2t2 + ... + Cntn

_________________

t1 + t2 + ... + tn

Where:

C = measured concentration of a substance at a work location (expressed in mg/m3 or in ppm)

t = duration of exposure to the substance at the same work location (expressed in hours)

1, 2, ... , n = indication of work locations

t1 + t2 + ... + tn = 8 hours or the total period of the shift in hours, whichever applies

Part 3

DAILY EXPOSURE TO SEVERAL SUBSTANCES

Where two or more substances listed in Parts 1 and 1.1 of this Schedule are present at the work location and where they have similar effects on the same organs of the human body, the effects of these substances are considered to be additive, unless it is established otherwise.

The concentration of the substances in the mixture is computed as follows:

C1 + C2 + ... + Cn

Rm = __ __ __

T1 T2 Tn

Where:

Rm = sum of the fractions of the mixture

C = measured concentration of a substance at a work location (expressed in mg/m3 or in ppm)

T = depending on the case, the time-weighted average exposure value permited under Parts 1 and 1.1 of this schedule or the adjusted average exposure value established in accordance with the Guide to the adjustment of permissible exposure values for unusual work schedules, published by the Institut de recherche Robert-Sauvé en santé et en sécurité du travail

1, 2, ... , n = indication of substances in the mixture

If Rm is greater than one, the time-weighted or adjusted average exposure value of the mixture of the substances is exceeded

Part 4

IDENTIFICATION OF SUBSTANCES ACCORDING TO THEIR CAS NUMBER

50-00-0 Formaldehyde

50-29-3 DDT (Dichlorodiphenyltrichloroethane)

50-32-8 Benzo(a)pyrene

50-78-2 Acetylsalicylic acid (Aspirin)

54-11-5 Nicotine

55-38-9 Fenthion

55-63-0 Nitroglycerin

56-23-5 Carbon tetrachloride

56-38-2 Parathion

56-55-3 Benz(a)anthracene

56-72-4 Coumaphos

56-81-5 Glycerin

57-11-4 Stearates

57-14-7 1,1-Dimethylhydrazine

57-24-9 Strychnine

57-50-1 Sucrose

57-57-8 ß-Propiolactone

57-74-9 Chlordane

58-89-9 Lindane

60-29-7 Diethyl ether

60-34-4 Methyl hydrazine

60-35-5 Acetamide

60-57-1 Dieldrin

61-82-5 Amitrole

62-53-3 Aniline

62-73-7 Dichlorvos

62-74-8 Sodium fluoroacetate

62-75-9 N-Nitrosodimethylamine

63-25-2 Carbaryl

64-17-5 Ethyl alcohol

64-18-6 Formic acid

64-19-7 Acetic acid

67-56-1 Methyl alcohol

67-63-0 Isopropyl alcohol

67-64-1 Acetone

67-66-3 Chloroform

67-72-1 Hexachloroethane

68-11-1 Thioglycolic acid

68-12-2 N,N-Dimethylformamide

71-23-8 n-Propyl alcohol

71-36-3 n-Butyl alcohol

71-43-2 Benzene

71-55-6 Methyl chloroform

72-20-8 Endrin

72-43-5 Methoxychlor

74-82-8 Methane

74-83-9 Methyl bromide

74-84-0 Ethane

74-85-1 Ethylene

74-86-2 Acetylene

74-87-3 Methyl chloride

74-88-4 Methyl iodide

74-89-5 Methylamine

74-90-8 Hydrogen cyanide

74-93-1 Methyl mercaptan

74-96-4 Ethyl bromide

74-97-5 Chlorobromomethane

74-98-6 Propane

74-99-7 Methyl acetylene

75-00-3 Ethyl chloride

75-01-4 Vinyl chloride

75-04-7 Ethylamine

75-05-8 Acetonitrile

75-07-0 Acetaldehyde

75-08-1 Ethyl mercaptan

75-09-2 Methylene chloride

75-12-7 Formamide

75-15-0 Carbon disulfide

75-21-8 Ethylene oxide

75-25-2 Bromoform

75-28-5 Isobutane

75-31-0 Isopropylamine

75-34-3 1,1-Dichloroethane

75-35-4 1,1-Dichloroethylene

75-43-4 Dichlorofluoromethane

75-44-5 Phosgene

75-45-6 Chlorodifluoromethane

75-47-8 Iodoform

75-50-3 Trimethylamine

75-52-5 Nitromethane

75-55-8 Propylene imine

75-56-9 Propylene oxide

75-61-6 Difluorodibromomethane

75-63-8 Bromotrifluoromethane

75-65-0 tert-Butyl alcohol

75-69-4 Trichlorofluoromethane

75-71-8 Dichlorodifluoromethane

75-74-1 Lead tetramethyl

75-86-5 Acetone cyanohydrin

75-91-2 tert-Butyl hydroperoxide

75-99-0 2,2-Dichloropropionic acid

76-03-9 Trichloroacetic acid

76-06-2 Chloropicrin

76-11-9 1,1,1,2-Tetrachloro-2,2-difluoroethane

76-12-0 1,1,2,2-Tetrachloro-1, 2-difluoroethane

76-13-1 1,1,2-Trichloro-1,2,2-trifluoroethane

76-14-2 1,2-Dichloro-1,1,2,2-tetrafluoroethane

76-15-3 Chloropentafluoroethane

76-22-2 Camphor (synthetic)

76-44-8 Heptachlor

77-47-4 Hexachlorocyclopentadiene

77-73-6 Dicyclopentadiene

77-78-1 Dimethyl sulfate

78-00-2 Lead tetraethyl

78-10-4 Ethyl silicate

78-30-8 Tri-o-cresyl phosphate

78-34-2 Dioxathion

78-59-1 Isophorone

78-78-4 Pentane

78-83-1 Isobutyl alcohol

78-87-5 1,2-Dichloropropane

78-92-2 sec-Butyl alcohol

78-93-3 Methyl ethyl ketone (MEK)

78-95-5 Chloroacetone

79-00-5 1,1,2-Trichloroethane

79-01-6 Trichloroethylene

79-04-9 Chloroacetyl chloride

79-06-1 Acrylamide

79-09-4 Propionic acid

79-10-7 Acrylic acid

79-20-9 Methyl acetate

79-21-0 Peracetic acid

79-24-3 Nitroethane

79-27-6 1,1,2,2-Tetrabromoethane

79-34-5 1,1,2,2-Tetrachloroethane

79-41-4 Methacrylic acid

79-44-7 Dimethyl carbamoyl chloride

79-46-9 2-Nitropropane

80-56-8 [a]-Pinene

80-62-6 Methyl methacrylate (monomer)

81-81-2 Warfarin

82-68-8 Pentachloronitrobenzene

83-26-1 Pindone

83-79-4 Rotenone

84-66-2 Diethyl phthalate

84-74-2 Dibutyl phthalate

85-00-7 Diquat

85-44-9 Phthalic anhydride

86-50-0 Azinphos-methyl

86-88-4 ANTU (∝Naphthylthiourea)

87-68-3 Hexachlorobutadiene

87-86-5 Pentachlorophenol

88-12-0 N-Vinyl-2-pyrrolidone

88-72-2 Nitrotoluene

88-89-1 Picric acid

89-72-5 o-sec-Butylphenol

90-04-0 o-Anisidine

90-12-0 1-Methyl naphthalene

91-20-3 Naphthalene

91-57-6 2-Methyl naphthalene

91-59-8 ß-Naphthylamine

91-94-1 3,3’-Dichlorobenzidine

92-52-4 Biphenyl

92-67-1 4-Aminodiphenyl

92-84-2 Phenothiazine

92-87-5 Benzidine (production)

92-93-3 4-Nitrodiphenyl

93-76-5 2,4,5-T

94-36-0 Benzoyl peroxide

94-75-7 2,4-D

95-13-6 Indene

95-47-6 Xylene

95-48-7 Cresol

95-49-8 o-Chlorotoluene

95-50-1 o-Dichlorobenzene

95-53-4 o-Toluidine

95-54-5 ortho-Phenylenediamine

96-05-9 Allyl methacrylate

96-18-4 1,2,3-Trichloropropane

96-22-0 Diethyl ketone

96-33-3 Methyl acrylate

96-69-5 4,4’-Thiobis (6-tert-butyl-m-cresol)

97-77-8 Disulfiram

98-00-0 Furfuryl alcohol

98-01-1 Furfural

98-07-7 Benzene (trichloromethyl)

98-51-1 p-tert-Butyltoluene

98-82-8 Cumene

98-83-9 ∝Methyl styrene

98-86-2 Acetophenone

98-95-3 Nitrobenzene

99-08-1 Nitrotoluene

99-65-0 Dinitrobenzene

99-99-0 Nitrotoluene

100-00-5 p-Nitrochlorobenzene

100-01-6 p-Nitroaniline

100-21-0 Terephthalic acid

100-25-4 Dinitrobenzene

100-37-8 2-Diethylaminoethanol

100-41-4 Ethyl benzene

100-42-5 Styrene (monomer)

100-44-7 Benzyl chloride

100-61-8 N-Methylaniline

100-63-0 Phenylhydrazine

100-74-3 N-Ethylmorpholine

100-97-0 Hexamethylenetetramine

101-14-4 4,4’-Methylene bis (2-chloroaniline) (MOCA)

101-68-8 Methylene bis (4-phenyl isocyanate) (MDI)

101-77-9 4,4’-Methylene dianiline

101-84-8 Phenyl ether, vapour

102-54-5 Dicyclopentadienyl iron

102-71-6 Triethanolamine

102-81-8 2-N-Dibutylaminoethanol

103-71-9 Phenyl isocyanate

104-94-9 p-Anisidine

105-46-4 Butyl acetate

105-60-2 Caprolactam

106-35-4 Ethyl butyl ketone

106-42-3 Xylene

106-44-5 Cresol

106-46-7 p-Dichlorobenzene

106-49-0 p-Toluidine

106-50-3 p-Phenylenediamine

106-51-4 p-Benzoquinone

106-87-6 Vinyl cyclohexene dioxide

106-89-8 Epichlorohydrin

106-92-3 Allyl glycidyl ether (AGE)

106-93-4 1,2-Dibromoethane

106-94-5 1-Bromopropane

106-97-8 Butane

106-99-0 1,3-Butadiene

107-02-8 Acrolein

107-05-1 3-Chloropropene

107-06-2 1,2-Dichloroethane

107-07-3 Ethylene chlorohydrin

107-13-1 Acrylonitrile

107-15-3 Ethylenediamine

107-18-6 Allyl alcohol

107-19-7 Propargyl alcohol

107-20-0 Chloroacetaldehyde

107-21-1 Ethylene glycol

107-30-2 Chloromethyl methyl ether

107-31-3 Methyl formate

107-41-5 Hexylene glycol

107-49-3 TEPP

107-66-4 Dibutyl phosphate

107-87-9 Methyl propyl ketone

107-98-2 Propylene glycol monomethyl ether

108-03-2 1-Nitropropane

108-05-4 Vinyl acetate

108-08-7 Heptane

108-10-1 Methyl isobutyl ketone

108-11-2 Methyl amyl alcohol

108-18-9 Diisopropylamine

108-20-3 Diisopropyl ether

108-21-4 Isopropyl acetate

108-21-4 Propyl acetate (isomers)

108-24-7 Acetic anhydride

108-31-6 Maleic anhydride

108-38-3 Xylene

108-39-4 Cresol

108-44-1 m-Toluidine

108-45-2 meta-Phenylenediamine

108-46-3 Resorcinol

108-83-8 Diisobutyl ketone

108-84-9 sec-Hexyl acetate

108-87-2 Methylcyclohexane

108-88-3 Toluene

108-90-7 Chlorobenzene

108-91-8 Cyclohexylamine

108-93-0 Cyclohexanol

108-94-1 Cyclohexanone

108-95-2 Phenol

108-98-5 Phenyl mercaptan

109-59-1 Isopropoxyethanol

109-60-4 n-Propyl acetate

109-60-4 Propyl acetate (isomers)

109-63-7 Boron trifluoride ethers

109-66-0 Pentane

109-73-9 n-Butylamine

109-79-5 Butyl mercaptan

109-86-4 2-Methoxyethanol (EGM

109-87-5 Methylal

109-89-7 Diethylamine

109-90-0 Ethyl isocyanate

109-94-4 Ethyl formate

109-99-9 Tetrahydrofuran

110-12-3 Methyl isoamyl ketone

110-19-0 Isobutyl acetate

110-43-0 Methyl n-amyl ketone

110-49-6 2-Methoxyethyl acetate (EGMEA)

110-54-3 n-Hexane

110-62-3 n-Valeraldehyde

110-80-5 2-Ethoxyethanol (EGEE)

110-82-7 Cyclohexane

110-83-8 Cyclohexene

110-85-0 Piperazine and salts

110-86-1 Pyridine

110-91-8 Morpholine

111-15-9 2-Ethoxyethyl acetate (EGEEA)

111-30-8 Glutaraldehyde

111-40-0 Diethylene triamine

111-42-2 Diethanolamine

111-44-4 Dichloroethyl ether

111-65-9 Octane

111-69-3 Adiponitrile

111-76-2 2-Butoxyethanol

111-84-2 Nonane

112-07-2 2-Butoxyethyl acetate

112-34-5 Diethylene glycol monobutyl ether

114-26-1 Propoxur

115-07-1 Propylene

115-29-7 Endosulfan

115-77-5 Pentaerythritol

115-86-6 Triphenyl phosphate

115-90-2 Fensulfothion

116-15-4 Hexafluoropropylene

117-81-7 Di-sec-octyl phthalate

118-52-5 1,3-Dichloro-5,5-dimethyl hydantoin

118-74-1 Hexachlorobenzene

118-96-7 2,4,6-Trinitrotoluene (TNT)

119-93-7 o-Tolidine

120-80-9 Catechol

120-82-1 1,2,4-Trichlorobenzene

121-44-8 Triethylamine

121-45-9 Trimethyl phosphite

121-69-7 N,N-Dimethylaniline

121-75-5 Malathion

121-82-4 Cyclonite

122-34-9 Simazine

122-39-4 Diphenylamine

122-60-1 Phenyl glycidyl ether (PGE)

123-19-3 Dipropyl ketone

123-31-9 Hydroquinone

123-38-6 Propionaldehyde

123-39-7 Monomethylformamide

123-42-2 Diacetone alcohol

123-51-3 Isoamyl alcohol

123-86-4 Butyl acetate

123-91-1 Dioxane

123-92-2 Pentyl acetate

124-04-9 Adipic acid

124-09-4 1,6-Diaminohexane

124-38-9 Carbon dioxide

124-40-3 Dimethylamine

126-73-8 Tributyl phosphate

126-98-7 Methylacrylonitrile

126-99-8 ß-Chloroprene

127-18-4 Perchloroethylene

127-19-5 N,N-Dimethylacetamide

127-91-3 ß-Pinene

128-37-0 2,6-Di-tert-butyl-p-cresol

131-11-3 Dimethylphthalate

133-06-2 Captan

135-88-6 N-Phenyl-ß-naphthylamine

136-78-7 Sesone

137-05-3 Methyl 2-cyanoacrylate

137-26-8 Thiram7

138-22-7 n-Butyl lactate

140-11-4 Benzyl acetate

140-88-5 Ethyl acrylate

141-32-2 n-Butyl acrylate

141-43-5 2-Aminoethanol

141-66-2 Dicrotophos

141-78-6 Ethyl acetate

141-79-7 Mesityl oxide

142-82-5 Heptane

144-62-7 Oxalic acid

148-01-6 Dinitolmide

150-76-5 4-Methoxyphenol

151-56-4 Ethylene imine

151-67-7 Halothane

156-62-7 Calcium cyanamide

205-99-2 Benzo(b)fluoranthene

218-01-9 Chrysene

287-92-3 Cyclopentane

298-00-0 Methyl parathion

298-02-2 Phorate

298-04-4 Disulfoton

299-84-3 Ronnel

299-86-5 Crufomate7

300-76-5 Naled

302-01-2 Hydrazine

309-00-2 Aldrin

314-40-9 Bromacil

330-54-1 Diuron

333-41-5 Diazinon7

334-88-3 Diazomethane

353-42-4 Boron trifluoride ethers

353-50-4 Carbonyl fluoride

382-21-8 Perfluoroisobutylene

409-21-2 Silicon carbide (non fibrous)

420-04-2 Cyanamide

431-03-8 Diacetyl

460-19-5 Cyanogen

463-51-4 Ketene

463-82-1 Pentane

471-34-1 Calcium carbonate

479-45-8 Tetryl

504-29-0 2-Aminopyridine

506-68-3 Cyanogen bromide

506-77-4 Cyanogen chloride

509-14-8 Tetranitromethane

528-29-0 Dinitrobenzene

532-27-4 ∝Chloroacetophenone

534-52-1 Dinitro-ortho-cresol

540-59-0 1,2-Dichloroethylene

540-88-5 Butyl acetate

541-85-5 Ethyl amyl ketone

542-75-6 Dichloropropene (cis and trans isomers)

542-88-1 bis (Chloromethyl) ether

542-92-7 Cyclopentadiene

546-93-0 Magnesite

552-30-7 Trimellitic anhydride

556-52-5 Glycidol

557-04-0 Stearates

557-05-1 Stearates

558-13-4 Carbon tetrabromide

563-12-2 Ethion

563-80-4 Methyl isopropyl ketone

565-59-3 Heptane

583-60-8 o-Methylcyclohexanone

589-34-4 Heptane

590-35-2 Heptane

591-76-4 Heptane

591-78-6 Methyl n-butyl ketone

592-41-6 1-Hexene

593-60-2 Vinyl bromide

594-42-3 Perchloromethyl mercaptan

594-72-9 1,1-Dichloro-1-nitroethane

598-78-7 2-Chloropropionic acid

600-25-9 1-Chloro-1-nitropropane

603-34-9 Triphenyl amine

620-11-1 Pentyl acetate

624-41-9 Pentyl acetate

624-83-9 Methyl isocyanate

625-16-1 Pentyl acetate

626-17-5 m-Phthalodinitrile

626-38-0 Pentyl acetate

627-13-4 n-Propyl nitrate

628-63-7 Pentyl acetate

628-96-6 Ethylene glycol dinitrate

630-08-0 Carbon monoxide

638-21-1 Phenylphosphine

638-37-9 Succinaldehyde

646-06-0 1,3-Dioxolane

680-31-9 Hexamethyl phosphoramide

681-84-5 Methyl silicate

684-16-2 Hexafluoroacetone

764-41-0 1,4-Dichloro-2-butene

768-52-5 N-Isopropylaniline

822-06-0 Hexamethylene diisocyanate

822-16-2 Stearates

944-22-9 Fonofos

994-05-8 Tert-Amyl methyl ether [TAME]

999-61-1 2-Hydroxypropyl acrylate

1024-57-3 Heptachlor epoxide

1120-71-4 Propane sultone

1189-85-1 tert-Butyl chromate

1300-73-8 Xylidine (mixed isomers)

1302-74-5 Corundum

1303-86-2 Boron oxide

1303-96-4 Borate, inorganic compounds

1304-82-1 Bismuth telluride Undoped

1305-62-0 Calcium hydroxide

1305-78-8 Calcium oxide

1309-37-1 Iron trioxide

1309-48-4 Magnesium oxide

1309-64-4 Antimony trioxide

1310-58-3 Potassium hydroxide

1310-73-2 Sodium hydroxide

1314-13-2 Zinc, oxide

1314-62-1 Vanadium pentoxide

1314-80-3 Phosphorus pentasulfide

1317-35-7 Manganese tetroxide

1317-65-3 Limestone

1317-95-9 Silica crystalline, Quartz/Tripoli

1319-77-3 Cresol (all isomers)

1321-12-6 Nitrotoluene

1321-64-8 Pentachloronaphthalene

1321-65-9 Trichloronaphthalene

1321-74-0 Divinyl benzene

1330-20-7 Xylene

1330-43-4 Borate, inorganic compounds

1332-58-7 Kaolin

1333-74-0 Hydrogen

1333-86-4 Carbon black

1335-87-1 Hexachloronaphthalene

1335-88-2 Tetrachloronaphthalene

1338-23-4 Methyl ethyl ketone peroxide

1343-98-2 Silica - Amorphous, precipitated

1344-95-2 Calcium silicate

1344-95-2 Calcium silicate (synthetic)

1395-21-7 Subtilisin

1477-55-0 m-Xylene-∝,∝ ’-diamine

1563-66-2 Carbofuran

1569-02-4 Propylene glycol ethyl ether

1634-04-4 Methyl tert-butyl ether

1912-24-9 Atrazine

1918-02-1 Picloram

1929-82-4 Nitrapyrin

2039-87-4 o-Chlorostyrene

2104-64-5 EPN

2179-59-1 Allyl propyl disulfide

2234-13-1 Octachloronaphthalene

2238-07-5 Diglycidyl ether (DGE)

2425-06-1 Captafol

2426-08-6 n-Butyl glycidyl ether (BGE)

2451-62-9 Triglycidyl isocyanurate (TGIC) (mixed isomers)

2528-36-1 Dibutyl phenyl phosphate

2551-62-4 Sulfur hexafluoride

2698-41-1 o-Chlorobenzylidene malononitrile

2699-79-8 Sulfuryl fluoride

2764-72-9 Diquat

2921-88-2 Chlorpyrifos

2971-90-6 Clopidol

3333-52-6 Tetramethyl succinonitrile

3383-96-8 Temephos

3425-89-6 Methyltetrahydrophthalic anhydride (isomers)

3687-31-8 Lead arsenate

3689-24-5 Sulfotep

3825-26-1 Ammonium perfluorooctanoate

4016-14-2 Isopropyl glycidyl ether (IGE)

4098-71-9 Isophorone diisocyanate

4170-30-3 Crotonaldehyde

4685-14-7 Paraquat

4685-14-7 Paraquat, respirable particulates

5124-30-1 Methylene bis (4-cyclohexylisocyanate)

5333-84-6 Methyltetrahydrophthalic anhydride (isomers)

5714-22-7 Sulfur pentafluoride

6385-62-2 Diquat

6423-43-4 Propylene glycol dinitrate

6923-22-4 Monocrotophos

7085-85-0 Ethyl 2-cyanoacrylate

7429-90-5 Aluminum

7439-92-1 Lead

7439-96-5 Manganese

7439-96-5 Manganese – Fumes, dust and compounds (as Mn) (inhalable)

7439-96-5 Manganese – Fumes, dust and compounds (as Mn) (respirable)

7439-97-6 Mercury

7439-98-7 Molybdenum

7440-01-9 Neon

7440-02-0 Nickel

7440-06-4 Platinum

7440-16-6 Rhodium

7440-21-3 Silicon

7440-22-4 Silver

7440-25-7 Tantalum

7440-28-0 Thallium

7440-31-5 Tin

7440-33-7 Tungsten

7440-36-0 Antimony

7440-37-1 Argon

7440-38-2 Arsenic

7440-39-3 Barium

7440-41-7 Beryllium

7440-43-9 Cadmium

7440-47-3 Chromium

7440-48-4 Cobalt

7440-50-8 Copper

7440-58-6 Hafnium

7440-59-7 Helium

7440-61-1 Uranium

7440-65-5 Yttrium

7440-67-7 Zirconium

7440-74-6 Indium

7446-09-5 Sulfur dioxide

7550-45-0 Titanium tetrachloride

7553-56-2 Iodine

7572-29-4 Dichloroacetylene

7580-67-8 Lithium hydride

7616-94-6 Perchloryl fluoride

7631-90-5 Sodium bisulfite

7637-07-2 Boron trifluoride

7646-85-7 Zinc chloride

7647-01-0 Hydrogen chloride

7664-38-2 Phosphoric acid

7664-39-3 Hydrogen fluoride

7664-41-7 Ammonia

7664-93-9 Sulfuric acid

7681-57-4 Sodium metabisulfite

7697-37-2 Nitric acid

7719-09-7 Thionyl chloride

7719-12-2 Phosphorus trichloride

7722-84-1 Hydrogen peroxide

7722-88-5 Tetrasodium pyrophosphate

7726-95-6 Bromine

7727-37-9 Nitrogen

7727-43-7 Barium sulfate

7758-97-6 Lead chromate

7773-06-0 Ammonium sulfamate

7778-18-9 Calcium sulfate

7782-41-4 Fluorine

7782-42-5 Graphite (all forms except fibres)

7782-49-2 Selenium

7782-50-5 Chlorine

7782-65-2 Germanium tetrahydride

7783-06-4 Hydrogen sulfide

7783-07-5 Hydrogen selenide

7783-41-7 Oxygen difluoride

7783-54-2 Nitrogen trifluoride

7783-60-0 Sulfur tetrafluoride

7783-79-1 Selenium hexafluoride

7783-80-4 Tellurium hexafluoride

7784-42-1 Arsine

7786-34-7 Phosdrin

7789-06-2 Strontium chromate

7789-30-2 Bromine pentafluoride

7790-91-2 Chlorine trifluoride

7803-51-2 Phosphine

7803-52-3 Stibine

7803-62-5 Silicon tetrahydride

8001-35-2 Chlorinated camphene

8002-74-2 Paraffin wax

8003-34-7 Pyrethrum

8006-61-9 Gasoline

8006-64-2 Turpentine

8008-20-6 Kerosene

8022-00-2 Methyl demeton

8029-10-5 Coal dust

8030-30-6 Rubber solvent (Naphtha)

8032-32-4 VM&P Naphtha

8050-09-7 Resin acids

8050-09-7 Rosin

8052-41-3 Stoddard solvent

8052-42-4 Asphalt (petroleum)

8065-48-3 Demeton7

9002-84-0 Polytetrafluoroethylene

9004-34-6 Cellulose (paper fibres)

9005-25-8 Starch

9014-01-1 Subtilisin

10024-97-2 Nitrous oxide

10025-67-9 Sulfur monochloride

10025-87-3 Phosphorus oxychloride

10026-13-8 Phosphorus pentachloride

10028-15-6 Ozone

10034-76-1 Calcium sulfate

10035-10-6 Hydrogen bromide

10043-35-3 Borate, inorganic compounds

10049-04-4 Chlorine dioxide

10101-41-4 Calcium sulfate

10102-43-9 Nitrogen monoxide

10102-44-0 Nitrogen dioxide

10210-68-1 Cobalt tetracarbonyl

10294-33-4 Boron tribromide

10294-34-5 Boron trichloride

11070-44-3 Methyltetrahydrophthalic anhydride (isomers)

11097-69-1 Chlorodiphenyl (54% chlorine)

11103-86-9 Zinc chromates

12001-26-2 Mica

12001-28-4 Asbestos Crocidolite

12001-29-5 Asbestos Chrysotile

12035-72-2 Nickel subsulfide

12079-65-1 Manganese cyclopentadienyl tricarbonyl

12108-13-3 Manganese methyl cyclopentadienyl

tricarbonyl

12125-02-9 Ammonium chloride

12172-67-7 Asbestos Actinolite

12172-73-5 Asbestos Amosite

12174-11-7 Fibres-Natural Mineral Fibres Attapulgite

12179-04-3 Borate, inorganic compounds

12185-10-3 Phosphorus (yellow)

12415-34-8 Emery

12604-58-9 Ferrovanadium (dust)

13071-79-9 Terbufos

13121-70-5 Cyhexatin

13397-24-5 Calcium sulfate

13463-39-3 Nickel carbonyl

13463-40-6 Iron pentacarbonyl

13463-67-7 Titanium dioxide

13466-78-9 ∆-3 Carene

13494-80-9 Tellurium

13530-65-9 Zinc chromates

13765-19-0 Calcium chromate

13838-16-9 Enflurane

13983-17-0 Fibres-Natural Mineral Fibres Wollastonite

14464-46-1 Silica - Crystalline, Cristobalite

14484-64-1 Ferbam

14567-73-8 Asbestos Tremolite

14807-96-6 Talc, non fibrous

14808-60-7 Silica crystalline, Quartz/Tripoli

14977-61-8 Chromyl chloride

15972-60-8 Alachlore

16219-75-3 Ethylidene norbornene

16752-77-5 Methomyl

16842-03-8 Cobalt hydrocarbonyl

17068-78-9 Asbestos Anthophyllite

17702-41-9 Decaborane

17804-35-2 Benomyl

19287-45-7 Diborane

19438-63-2 Methyltetrahydrophthalic anhydride (isomers)

19438-64-3 Methyltetrahydrophthalic anhydride (isomers)

19624-22-7 Pentaborane

20816-12-0 Osmium tetroxide

21087-64-9 Metribuzin

21351-79-1 Cesium hydroxide

21725-46-2 Cyanazine

22224-92-6 Fenamiphos

22781-23-3 Bendiocarb

25013-15-4 Vinyl toluene

25154-54-5 Dinitrobenzene

25321-14-6 Dinitrotoluene

25551-13-7 Trimethyl benzene

25639-42-3 Methylcyclohexanol

26140-60-3 Terphenyls

26471-62-5 Toluene diisocyanate (TDI) (isomers mixture)

26590-20-5 Methyltetrahydrophthalic anhydride (isomers)

26628-22-8 Sodium azide

26952-21-6 Isooctyl alcohol

31242-93-0 Chlorinated diphenyl oxide

34590-94-8 Dipropylene glycol monomethyl ether

35400-43-2 Sulprofos

37300-23-5 Zinc chromates

42498-58-8 Methyltetrahydrophthalic anhydride (isomers)

50926-11-9 Indium tin oxide

51235-04-2 Hexazinone

53469-21-9 Chlorodiphenyl (42% chlorine)

53570-85-7 Coal dust (less than 5% crystalline silica)

55720-99-5 Chlorinated diphenyl oxide

59355-75-8 Methyl acetylene-propadiene mixture (MAPP)

59653-73-5 Triglycidyl isocyanurate (TGIC) (alpha-)

59653-74-6 Triglycidyl isocyanurate (TGIC) (beta-)

60676-86-0 Amorphous silica, fused

61788-32-7 Hydrogenated terphenyls

61790-53-2 Silica - Amorphous, Diatomaceous earth

(uncalcined)

63231-67-4 Silica - Amorphous, gel

64742-81-0 Kerosene

65996-93-2 Coal tar pitch volatiles, as benzene solubles

65997-15-1 Portland cement

66733-21-9 Fibres-Natural Mineral Fibres Erionite

68334-30-5 Diesel

68476-30-2 Diesel

68476-31-3 Diesel

68476-34-6 Diesel

68476-85-7 L.P.G. (Liquified petroleum gas)

68956-68-3 Vegetable oil

69012-64-2 Silica - Amorphous, fumes

74222-97-2 Sulfometuron methyl

77536-67-5 Anthophyllite asbestos

77650-28-3 Diesel

83969-76-0 Perlite

112926-00-8 Silica - Amorphous, gel

308062-82-0 Coal dust

O.C. 885-2001, Sch. I; O.C. 1120-2006, ss. 11 and 12; O.C. 915-2011, ss. 2 and 3; O.C. 1079-2012, s. 1; O.C. 159-2020, s. 1; O.C. 159-2020, s. 2; O.C. 644-2022, ss. 2 and 3; O.C. 280-2024, s. 2; O.C. 644-2022, s. 4.

2024-03-14

SCHEDULE I

(ss. 41, 42, 43, 66, 108 and 302)

PERMISSIBLE EXPOSURE VALUES FOR GASES, DUSTS, FUMES, VAPOURS OR MISTS IN THE WORK ENVIRONMENT

DEFINITIONS AND NOTES

This Schedule must be read in accordance with the following notations and definitions:

(1) CARCINOGENS: The designations under “carcinogen” in the Designation and remarks column refer to the following:

C1: carcinogenic effect detected in humans

C2: carcinogenic effect suspected in humans

C3: carcinogenic effect detected in animals. Results of studies relating to the carcinogenocity of these substances in animals are not necessarily applicable to humans.

(2) CAS: Number given by the Chemical Abstracts Service, a division of the American Chemical Society, for the identification of a substance (see part 4).

(3) C: CEILING: The designation “C” in the STEV/Ceiling column refers to a concentration never be exceeded during any length of time whatsoever.

(4) EM: A substance to which exposure must be reduced to a minimum in accordance with section 42.

(4.1) EX: a substance that is flammable and exposure to the permissible exposure value level involves a risk of exceeding 10% of the lower explosion limit.

(5) EXCURSION LIMITS: These limits apply to substances which do not have a short-term exposure value. Provided the time-weighted average exposure value is not exceeded, excursions in exposure levels may exceed 3 times that value for a cumulative period not exceeding a total of 30 minutes during a workday. Notwithstanding the foregoing, none of those excursions in exposure levels may exceed 5 times the time-weighted average exposure value during any length of time whatsoever.

(5.1) IFV: inhalable fraction and vapour.

(5.2) J: excluding stearates of toxic metals.

(6) mg/m3: milligram per cubic meter (milligram of substance per cubic meter of air).

(7) Pc: SKIN (percutaneous): The designation “Pc” in the Designation and remarks column refers to the potentially significant contribution to the overall exposure by the cutaneous route. Exposure is by contact with vapours or, of probable greater significance, by direct skin contact with the substance. The cutaneous route includes mucous membranes and the eyes.

(8) ppm: part per million (parts of gas or vapour per million parts of airborn contaminants per volume measured at 25 °C and 101.3 kPa).

(9) Rd: Respirable dust.

(9.1) Pi: inhalable aerosol fraction.

(10) RESPIRABLE FIBRES (other than respirable asbestos fibres): Objects, other than respirable asbestos fibres, longer than 5 µm, having a diameter of less than 3 µm and a ratio of length to diameter of more than 3 :1.

(11) Pr: respirable aerosol fraction.

(12) TPM: total particulate matter.

(12.1) Pthor: thoracic aerosol fraction.

(13) SIMPLE ASPHYXIANT: A physiologically inert gas which acts primarily by displacing airborne oxygen and that can cause a decrease in the percentage in volume of airborne oxygen below the 19.5% provided for in section 40 and required to maintain blood oxygen saturation.

(14) STEV: SHORT-TERM EXPOSURE VALUE: The 15-minute time-weighted average concentration for exposure to a chemical substance (in the form of gases, dusts, fumes, vapours or mists), present in the air in a worker’s respiratory zone which should not be exceeded at any time during a workday, even if the time-weighted average exposure value is not exceeded.

The average exposure for a 15-minute consecutive period may be include between the TWAEV and the STEV, insofar as such exposures are not repeated more than 4 times a day and have intervals between them of periods of at least 60 minutes.

(14.1) S(D): a substance causing dermal sensitization.

(14.2) S(R): a substance causing respiratory sensitization.

(14.3) OTO: OTOTOXIC: the “OTO” notation in the Designation and remarks column indicates that repeated exposure to the substance may cause hearing impairment alone or in combination with noise, even below 85 dBA.

(15) Td: Total dust.

(15.1) Thord: thoracic dust.

(16) TWAEV: TIME-WEIGHTED AVERAGE EXPOSURE VALUE: The time-weighted average concentration for an 8-hour workday and a 40-hour workweek of a chemical substance (in the form of gases, dusts, fumes, vapours or mists) present in the air in a worker’s respiratory zone.

For any work period equal to or longer than 4 hours but less than 8 hours or a period in excess of 8 hours but less than or equal to 16 hours, an adjusted average exposure value (AAEV) must be established in accordance with the Guide to the adjustment of permissible exposure values for unusual work schedules, published by the Institut de recherche Robert-Sauvé en santé et en sécurité du travail. Under no circumstance may the AAEV be higher than the TWAEV.

EXPLANATION OF NOTES:

Note 1: The standard corresponds to dust containing no asbestos and the percentage in crystalline silica is less than 1%.

Note 2a: Permissible asbestos exposure values in number of respirable fibres per cm3.

Note 2b: Permissible recirculation concentration of asbestos respirable dust: 0.1 mg/m3.

Note 3: Where the use of these products is permitted.

Note 4: Permissible exposure values in number of respirable fibres per cm3.

Part 1

PERMISSIBLE EXPOSURE VALUES FOR AIRBORNE CONTAMINANTS

			TWAEV		STEV/Ceiling		Designation and remarks
	Substance	[#CAS]	ppm	mg/m3	ppm	mg/m3
Abate			See Temephos
Acetaldehyde		[75-07-0]			C25	C45	C3,RP
Acetamide		[60-35-5]	1				C3,IFV
Acetic acid		[64-19-7]	10	25	15	37
Acetic anhydride		[108-24-7]	1		3
Acetone		[67-64-1]	250		500
Acetone cyanohydrin (as CN)		[75-86-5]			C4.7	C5	Pc,RP
Acetonitrile		[75-05-8]	20				Pc
Acetophenone		[98-86-2]	10	49
Acetylene		[74-86-2]	Simple asphyxiant
Acetylene dichloride			See 1,2-Dichloroethylene
Acetylene tetrabromide			See 1,1,2,2-Tetrabromoethane
Acetylsalicylic acid (Aspirin)		[50-78-2]		5
Acrolein		[107-02-8]	0.1	0.23	0.3	0.69
Acrylamide		[79-06-1]		0.03			Pc,C2,EM
Acrylic acid		[79-10-7]	2	5.9			Pc
Acrylonitrile		[107-13-1]	2	4.3			Pc,C2,RP,EM
Actinolite			See Asbestos
Adipic acid		[124-04-9]		5
Adiponitrile		[111-69-3]	2	8.8			Pc
Alachlore		[15972-60-8]		1			C3,S(D),IVF
Aldrin		[309-00-2]		0.25			Pc
Allyl alcohol		[107-18-6]	0.5				Pc
Allyl chloride			See 3-Chloropropene
Allyl glycidyl ether (AGE)		[106-92-3]	1
Allyl methacrylate		[96-05-9]	1				Pc
Allyl propyl disulfide		[2179-59-1]	0.5				S(D)
Aluminum and its compounds				5			Rd
4-Aminodiphenyl		[92-67-1]	Without applicable permissible exposure value				Pc,C1,RP,EM
2-Aminoethanol		[141-43-5]	3	7.5	6	15
2-Aminopyridine		[504-29-0]	0.5	1.9
3-Amino-1,2,4-triazole			See Amitrole
Amitrole		[61-82-5]		0.2			C3,RP
Ammonia		[7664-41-7]	25	17	35	24
Ammonium chloride fume		[12125-02-9]		10		20
Ammonium perfluorooctanoate		[3825-26-1]		0.01			C3,Pc
Ammonium sulfamate		[7773-06-0]		10
Amosite			See Asbestos
Aniline		[62-53-3]	2	7.6			Pc
o-Anisidine		[90-04-0]	0.1	0.5			Pc,C3
p-Anisidine		[104-94-9]	0.1	0.5			Pc
Anthophyllite			See Asbestos
Antimony [7440-36-0], metal and compounds (as Sb)				0.5
Antimony trioxide (as Sb)		[1309-64-4]		0.5			C3
Antimony trioxide, production (as Sb)			Without applicable permissible exposure value				C2,RP,EM
ANTU (α-Naphthylthiourea)		[86-88-4]		0.3
Argon		[7440-37-1]	Simple asphyxiant
Arsenic, elemental [7440-38-2], and inorganic compounds (except Arsine), (as As)				0.01			C1,RP,EM
Arsine		[7784-42-1]	0.005
Asbestos – All forms (note 2a) (note 2b)		[1332-21-4]		0.1 fibre/cm3			C1,EM
	Actinolite	[12172-67-7]		0.1 fibre/cm3			C1,EM
	Amosite (note 3)	[12172-73-5]		0.1 fibre/cm3			C1,EM
	Anthophyllite	[77536-67-5]		0.1 fibre/cm3			C1,EM
	Chrysotile	[12001-29-5]		0.1 fibre/cm3			C1,EM
	Crocidolite (note 3)	[12001-28-4]		0.1 fibre/cm3			C1,EM
	Tremolite	[14567-73-8]		0.1 fibre/cm3			C1,EM
Asphalt (petroleum) fumes		[8052-42-4]		5
Aspirin			See Acetylsalicylic acid
Atrazine		[1912-24-9]		5
Attapulgite			See Fibres-Natural Mineral Fibres
Azinphos-methyl		[86-50-0]		0.2			Pc,S(D),IVF
Barium [7440-39-3], soluble compounds (as Ba)				0.5
Barium sulfate		[7727-43-7]		5			Id, note 1
Bendiocarb		[22781-23-3]		0.1			Pc
Benomyl		[17804-35-2]		1			C3,S(D),Id
Benz(a)anthracene		[56-55-3]	Without applicable permissible exposure value				C2,EM
Benzene		[71-43-2]	0.5		2.5		C1,RP,EM,Pc
Benzene (trichloromethyl)		[98-07-7]			P0.1		C2,Pc,RP,EM
Benzidine (production)		[92-87-5]	Without applicable permissible exposure value				Pc,C1,RP,EM
Benzo(a)pyrene		[50-32-8]		0.005			C2,RP,EM
Benzo(b)fluoranthene		[205-99-2]	Without applicable permissible exposure value				C2,EM
p-Benzoquinone		[106-51-4]	0.1	0.44
Benzoyl peroxide		[94-36-0]		5
Benzyl acetate		[140-11-4]	10
Benzyl chloride		[100-44-7]	1				C3
		[1303-96-4]
Beryllium [7440-41-7], metal and compounds (as Be)				0.00015			C1,RP,EM,S
Biphenyl		[92-52-4]	0.2	1.3
Bismuth telluride (as Bi2Te3)
	Se-doped			5
	Undoped	[1304-82-1]		10
Bitumen			See Asphalt fumes
Borate, inorganic compounds, (including boric acid)		[1330-43-4]
		[10043-35-3]
		[12179-04-3]		2		6	Id
Borax			See Sodium tetraborate, decahydrate
Boron oxide		[1303-86-2]		10
Boron tribromide		[10294-33-4]			C0.7		RP
Boron trichloride		[10294-34-5]			C0.7		RP
Boron trifluoride		[7637-07-2]	0.1		C0.7		RP
Boron trifluoride ethers		[109-63-7];	0.1		P0.7
		[353-42-4]
Bromacil		[314-40-9]		10			C3
Bromine		[7726-95-6]	0.1	0.66	0.2	1.3
Bromine pentafluoride		[7789-30-2]	0.1	0.72
Bromochloromethane			See Chlorobromethane
2-Bromo-2-chloro-1,1,1-trifluoroethane			See Halothane
Bromoethane			See Ethyl bromide
Bromoethylene			See Vinyl bromide
Bromoform		[75-25-2]	0.5				C3
Bromomethane			See Methyl bromide
Bromotrifluoromethane		[75-63-8]	1000	6090
1,3-Butadiene		[106-99-0]	2	4.4			C2,EM
Butane		[106-97-8]	800	1900
Butanethiol			See Butyl mercaptan
2-Butanone			See Methyl ethyl ketone (MEK)
2-Butoxyethanol		[111-76-2]	20				C3
2-Butoxyethyl acetate		[112-07-2]	20				C3
Butyl acetate (all isomers)		[105-46-4]
		[110-19-0]
		[123-86-4]
		[540-88-5]	50		150
n-Butyl acrylate		[141-32-2]	2				S(D)
n-Butyl alcohol		[71-36-3]	20
sec-Butyl alcohol		[78-92-2]	100	303
tert-Butyl alcohol		[75-65-0]	100	303
Butyl cellosolve®			See 2-Butoxyethanol
tert-Butyl chromate (as CrO3)		[1189-85-1]				C0.1	Pc, RP
n-Butyl glycidyl ether (BGE)		[2426-08-6]	3				Pc, S(D)
tert-Butyl hydroperoxide		[75-91-2]	0.1				Pc
n-Butyl lactate		[138-22-7]	5	30
Butyl mercaptan		[109-79-5]	0.5	1.8
n-Butylamine		[109-73-9]			C5	C15	Pc, RP
o-sec-Butylphenol		[89-72-5]	5	31			Pc
p-tert-Butyltoluene		[98-51-1]	1	6.1
Cadmium elemental and compounds (as Cd)		[7440-43-9]		0.01			C2, RP, EM
Calcium carbonate		[471-34-1]		10			Td
Calcium carbonate		[1317-65-3]		10			Td, note 1
Calcium cyanamide		[156-62-7]		0.5
Calcium hydroxide		[1305-62-0]		5
Calcium oxide		[1305-78-8]		2
Calcium silicate		[1344-95-2]		1			Pi,Note 1
Calcium sulfate		[7778-18-9]
		[13397-24-5]
		[10034-76-1]
		[10101-41-4]		10			Id, note 1
Camphor (synthetic)		[76-22-2]	2	12	3	19
Caprolactam		[105-60-2]		5			IFV
Captafol		[2425-06-1]		0.1			Pc
Captan		[133-06-2]		5
Carbaryl		[63-25-2]		5
Carbofuran		[1563-66-2]		0.1			IVF
Carbon black		[1333-86-4]		3			C3 Id
Carbon dioxide		[124-38-9]	5000	9000	30000	54000
Carbon disulfide		[75-15-0]	1				Pc
Carbon monoxide		[630-08-0]	35		175
Carbon tetrabromide		[558-13-4]	0.1	1.4	0.3	4.1
Carbon tetrachloride		[56-23-5]	5	31	10	63	Pc,C2,EM
Carbon, fibres			See Fibres-Organic Synthetic Fibres
Carbonyl chloride			See Phosgene
Carbonyl fluoride		[353-50-4]	2	5.4	5	13
Catechol		[120-80-9]	5				C3,Pc
Cellosolve® acetate			See 2-Ethoxyethyl acetate
Cellulose (paper fibres)		[9004-34-6]		10			Td, note 1
Ceramic (fibres)			See Fibres-Artificial Vitreous Mineral Fibres
Cesium hydroxide		[21351-79-1]		2
Chlordane		[57-74-9]		0.5			Pc,C3,IFV
Chlorinated camphene		[8001-35-2]		0.5		1	Pc,C3
Chlorinated diphenyl oxide		[31242-93-0]		0.5
Chlorinated diphenyl oxide		[55720-99-5]		0.5
Chlorine		[7782-50-5]			P0.5
Chlorine dioxide		[10049-04-4]			P0.1
Chlorine trifluoride		[7790-91-2]			C0.1	C0.38	RP
2-Chloro-6-(trichloromethyl) pyridine			See Nitrapyrin
Chloroacetaldehyde		[107-20-0]			C1	C3.2	RP
Chloroacetone		[78-95-5]			C1	C3.8	Pc,RP
α-Chloroacetophenone		[532-27-4]	0.05	0.32
Chloroacetyl chloride		[79-04-9]	0.05	0.23	0.15	0.69	Pc
Chlorobenzene		[108-90-7]	10				C3
o-Chlorobenzylidene malononitrile		[2698-41-1]			C0.05		Pc,S,RP
Chlorobromomethane		[74-97-5]	200	1060
2-Chloro-1,3-butadiene			See ß-Chloroprene
Chlorodifluoromethane		[75-45-6]	1000	3540
Chlorodiphenyl (42% chlorine)		[53469-21-9]		1			Pc,C2,EM
Chlorodiphenyl (54% chlorine)		[11097-69-1]		0.5			Pc,C2,EM
1-Chloro-2,3-epoxypropane			See Epichlorohydrin
Chloroethane			See Ethyl chloride
2-Chloroethanol			See Ethylene chlorohydrin
bis (Chloroethyl) ether			See Dichloroethyl ether
Chloroethylene			See Vinyl chloride (monomer)
Chloroform		[67-66-3]	5	24.4			C2,RP,EM
Chloromethane			See Methyl chloride
Chloromethyl methyl ether		[107-30-2]	Without applicable permissible exposure value				C1,RP,EM
bis (Chloromethyl) ether		[542-88-1]	0.001	0.0047			C1,RP,EM
p-Chloronitrobenzene			See p-Nitrochlorobenzene
1-Chloro-1-nitropropane		[600-25-9]	2	10
Chloropentafluoroethane		[76-15-3]	1000	6320
Chloropicrin		[76-06-2]	0.1	0.67
ß-Chloroprene		[126-99-8]	1				Pc,C2,RP,EM
3-Chloropropene		[107-05-1]	1	3	2	6
2-Chloropropionic acid		[598-78-7]	0.1	0.44			Pc
o-Chlorostyrene		[2039-87-4]	50	283	75	425
o-Chlorotoluene		[95-49-8]	50	259
Chlorpyrifos		[2921-88-2]		0.2			Pc
Chromium (metal)		[7440-47-3]		0.5			Pi
Chromium III compounds (as Cr)				0.5
Chromium VI, water insoluble inorganic compounds (as Cr)				0.001			C1,RP,EM
Chromium VI, water soluble inorganic compounds (as Cr)				0.05			C1,RP,EM,S
Chromyl chloride (as Cr)		[14977-61-8]	0.0001		0.00025		Pc,C1,RP,EM,S(D),S(R),IFV
Chrysene		[218-01-9]	Without applicable permissible exposure value				C2,RP,EM
Chrysotile			See Asbestos
Clopidol		[2971-90-6]		3			IFV
Coal dust		[8029-10-5];		0.9			Pr
		[308062-82-0]
Coal tar pitch volatiles, as benzene solubles		[65996-93-2]		0.2			C1,RP,EM
Cobalt hydrocarbonyl (as Co)		[16842-03-8]		0.1
Cobalt tetracarbonyl (as Co)		[10210-68-1]		0.1
Cobalt, elemental and inorganic compounds (as Co)		[7440-48-4]		0.02			Pi,C3,S(D),S(R)
Continuous filament fibres (fibrous glass)			See Fibres-Artificial Vitreous Mineral Fibres
Copper [7440-50-8], fume (as Cu)				0.2
Copper [7440-50-8], dusts & mists (as Cu)				1
Cotton dust				0.1			Thord
Coyden®			See Clopidol
Crag®			See Sesone
Cresol (all isomers)		[1319-77-3]
		[95-48-7]
		[108-39-4]
		[106-44-5]		20			Pc,IFV
Cristobalite			See Silica
Crocidolite			See Asbestos
Crotonaldehyde		[4170-30-3]			C0.3		C3,Pc
Crufomate®		[299-86-5]		5
Cumene		[98-82-8]	5				C3
Cyanamide		[420-04-2]		2
Cyanazine		[21725-46-2]		0.1			Pi,C3
Cyanides (as CN)		[143-33-9];				P5	Pc
		[151-50-8];
		[592-01-8]
Cyanogen		[460-19-5]			C5
Cyanogen bromide		[506-68-3]			C0.3
Cyanogen chloride		[506-77-4]			C0.3	C0.75	RP
Cyclohexane		[110-82-7]	300	1030
Cyclohexanol		[108-93-0]	50	206			Pc
Cyclohexanone		[108-94-1]	20		50		Pc,C3
Cyclohexene		[110-82-7]	100
Cyclohexylamine		[108-91-8]	10	41
Cyclonite		[121-82-4]		0.5			Pc
Cyclopentane		[287-92-3]	600	1720
Cyhexatin		[13121-70-5]		5
2,4-D		[94-75-7]		10			C2,EM
DDT (Dichlorodiphenyltrichloroethane)		[50-29-3]		1			C3
Decaborane		[17702-41-9]	0.05	0.25	0.15	0.75	Pc
Demeton®		[8065-48-3]	0.01	0.11			Pc
Di-sec-octyl phthalate		[117-81-7]		5		10	C3
2,6-Di-tert-butyl-p-cresol		[128-37-0]		2			IFV
Diacetone alcohol		[123-42-2]	50	238
Diacetyl		[431-03-8]	0.01		0.02
4,4’-Diaminodiphenylmethane			See 4,4’-Methylene dianiline
1,2-Diaminoethane			See Ethylenediamine
1,6-Diaminohexane		[124-09-4]	0.5	2.3
Diatomaceous earth			See Silica
Diazinon®		[333-41-5]		0.1			Pc
Diazomethane		[334-88-3]	0.2				C2,RP,EM
Diborane		[19287-45-7]	0.1	0.11
Dibromodifluoromethane			See Diflurodibromomethane
1,2-Dibromoethane		[106-93-4]	20	155			Pc,C2,RP,EM
Dibrom®			See Naled
Dibutyl phenyl phosphate		[2528-36-1]	0.3	3.5			Pc
Dibutyl phosphate		[107-66-4]		5			Pc,IFV
Dibutyl phthalate		[84-74-2]		5
2-N-Dibutylaminoethanol		[102-81-8]	0.5				Pc
3,3’-Dichloro-4,4’-diamino-diphenylmethane			See 4,4’-Methylene bis (2-chloroaniline)
1,3-Dichloro-5,5-dimethyl hydantoin		[118-52-5]		0.2		0.4
Dichloroacetylene		[7572-29-4]			C0.1		C3,RP
o-Dichlorobenzene		[95-50-1]	25		50
p-Dichlorobenzene		[106-46-7]	10				C3
3,3’-Dichlorobenzidine		[91-94-1]	Without applicable permissible exposure value				Pc,C2,RP,EM
1,4-Dichloro-2-butene		[764-41-0]	0.005	0.025			Pc,C2,EM
Dichlorodifluoromethane		[75-71-8]	1000	4950
3,5-Dichloro-2,6-dimethyl-4 pyridinol			See Clopidol
Dichlorodiphenyltrichloroethane			See DDT
1,1-Dichloroethane		[75-34-3]	100	405
1,2-Dichloroethane		[107-06-2]	1	4	2	8	C2,EM
Dichloroethyl ether		[111-44-4]	5	29	10	58	Pc
1,1-Dichloroethylene		[75-35-4]	1	4
1,2-Dichloroethylene		[540-59-0]	200	793
Dichlorofluoromethane		[75-43-4]	10	42
Dichloromethane			See Methylene chloride
1,1-Dichloro-1-nitroethane		[594-72-9]	2	12
(2,4-Dichlorophenoxy) acetic acid			See 2.4-D
1,2-Dichloropropane		[78-87-5]	10				S(D)
Dichloropropene (cis and trans isomers)		[542-75-6]	1	4.5			Pc,C3
2,2-Dichloropropionic acid		[75-99-0]		5			Id
1,2-Dichloro-1,1,2,2-tetrafluoroethane		[76-14-2]	1000	6990
Dichlorvos		[62-73-7]	0.1	0.9			Pc
Dicrotophos		[141-66-2]		0.25			Pc
4,4’-Dicyclohexyl methane diisocyanate			See Methylene bis (4-cyclohexylisocyanate)