S-2.1, r. 11 - Regulation respecting the quality of the work environment

Schedule Disposition versions

2012-09-01

SCHEDULE A

(ss. 5, 5.2, 11 and 21)

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

Notes and Definitions

(1) 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.

(2) 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.

Exposures above the time-weighted average exposure value and below the short-term exposure value should not be longer than 15 consecutive minutes and should not occur more than 4 times per day. There should be at least 60 minutes between such exposures.

(3) 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.

(4) CEILING VALUE:

The ceiling value is indicated by the letter “C” preceding a time-weighted average exposure value. In such cases, the concentration specified should never be exceeded during any length of time whatsoever.

(5) SKIN:

The designation “Skin” in the remark column refers to the potential 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.

(6) CARCINOGENS:

The designations under “carcinogen” in the Remark 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.

(7) RESPIRABLE FIBRES (other than respirable asbestos fibres):

Objects longer than 5 µm having a diameter of less than 3 µm and a ratio of length to diameter of more than 3:1.

(8) PPM:

The expression “ppm” means “part per million” (parts of gas or vapour per million parts of airborne contaminants per volume measured at 25 ºC and 101.3 kPa).

(9) MG/M3:

the expression “mg/m3” means “milligram per cubic metre” (milligram of substance per cubic metre of air).

(10) 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 7 and required to maintain blood oxygen saturation.

NOTES IN THE GENERAL TABLE:

Note 1 - The standard corresponds to dust containing no asbestos and < 1% of crystalline silica.

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 IGeneral table

EXPOSURE VALUES FOR AIRBORNE CONTAMINANTS

		Time-weighted
average
exposure value		Short-term
exposure
value		

Remark	
Substance	[CAS#]	ppm	mg/m3	ppm	mg/m3	Skin	Carcinogen
Abate		 See Temephos					
Acetaldehyde	[75-07-0]	100	180	150	270		C3
Acetic acid	[64-19-7]	10	25	15	37		
Acetic anhydride	[108-24-7]	P5	P21				
Acetone	[67-64-1]	750	1780	1000	2380		
Acetonitrile	[75-05-8]	40	67	60	101		
Acetylene	[74-86-2]	 Simple asphyxiant					
Acetylene dichloride		 See 1,2-Dichloroethylene					
Acetylene tetrabromide		 See 1,1,2,2-Tetrabromoethane					
Acetylsalicylic acid	[50-78-2]		5				
Acrolein	[107-02-8]	0,1	0,23	0,3	0,69		
Acrylamide	[79-06-1]		0,03			X	C2
Acrylic acid	[79-10-7]	10	29			X	
Acrylonitrile	[107-13-1]	2	4,3			X	C2
Actinolite		 See Asbestos					
Aldrin	[309-00-2]		0,25			X	
Allyl alcohol	[107-18-6]	2	4,8	4	9,5	X	
Allyl chloride		 See 3-Chloropropene					
Allyl glycidyl ether (AGE)	[106-92-3]	5	23	10	47		
Allyl propyl disulfide	[2179-59-1]	2	12	3	18		
Aluminum (as Al)	[7429-90-5]						
Alkyls (NOC)
	Metal
	Pyro powders
	Soluble salts
	Welding fumes			2
10
5
2
5				
Aluminum oxide (as Al)	[1344-28-1]		10			[total dust, note 1]	
4-Aminodiphenyl	[92-67-1]					X	C1
2-Aminoethanol	[141-43-5]	3	7,5	6	15		
2-Aminopyridine	[504-29-0]	0,5	2,0				
3-Amino-1,2,4-triazole		 See Amitrole					
Amitrole	[61-82-5]		0,2				C3
Ammonia	[7664-41-7]	25	17	35	24		
Ammonium chloride fume	[12125-02-9]		10		20		
Ammonium perfluorooctanoate	[3825-26-1]		0,1				
Ammonium sulfamate	[7773-06-0]		10				
Amosite		 See Asbestos					
n-Amyl acetate	[628-63-7]	100	532				
sec-Amyl acetate	[626-38-0]	125	665				
Aniline	[62-53-3]	2	7,6			X	
o-Anisidine	[90-04-0]	0,1	0,5			X	C3
p-Anisidine	[104-94-9]	0,1	0,5			X	
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)							C2
ANTU (a-Naphthylthiourea)	[86-88-4]		0,3				
Argon	[7440-37-1]	 Simple asphyxiant					
Arsenic [7440-38-2], metal and soluble
compounds (as As)			0,2				
Arsenic trioxide, production	[1327-53-3]						C2
Arsine	[7784-42-1]	0,05	0,16				
Asbestos (note 2a) (note 2b)
	Actinolite
	Amosite (note 3)
	Anthophyllite
	Chrysotile
	Crocidolite (note 3)
	Tremolite	
[12172-67-7]
[12172-73-5]
[17068-78-9]
[12001-29-5]
[12001-28-4]
[14567-73-8]	
1 fibre/cm  
0,2 fibre/cm
1 fibre/cm
1 fibre/cm
0,2 fibre/cm
1 fibre/cm		
5 fibres/cm3
1 fibre/cm3
5fibres/cm3
5 fibres/cm3
1 fibre/cm3
5 fibres/cm3			
C1
C1
C1
C1
C1
C1
Asphalt (petroleum) fumes	[8052-42-4]		5				
Aspirin		 See Acetylsalicylic acid					
Atrazine	[1912-24-9]		5				
Attapulgite		 See Fibres-Natural Mineral Fibres					
Azimphos-methyl	[86-50-0]		0,2			X	
Barium [7440-39-3], soluble
compounds (as Ba)			
0,5				
Barium sulfate	[7727-43-7]		10
5			[total dust, note 1]
[respirable dust, note 1]	
Benomyl	[17804-35-2]	0,84	10				
Benzene	[71-43-2]	1	3	5	15,5		C1
Benzidine (production)	[92-87-5]					X	C1
Benzo(a)pyrene	[50-32-8]		0,005				C2
p-Benzoquinone	[106-51-4]	0,1	0,44				
Benzoyl peroxide	[94-36-0]		5				
Benzyl chloride	[100-44-7]	1	5,2				
Beryllium [7440-41-7], metal and
compounds (as Be)			
0,002				
C2
Biphenyl	[92-52-4]	0,2	1,3				
Bismuth telluride (as Bi2Te3)
	Se-doped
	Undoped	

[1304-82-1]		
5
10				
Borates, tetra, sodium salt
	Anhydrous
	Decahydrate
	Pentahydrate	
[1330-43-4]
[1303-96-4]
[12045-88-4]		
1
5
1				
Boron oxide	[1303-86-2]		10				
Boron tribromide	[10294-33-4]	P1	P10				
Boron trifluoride	[7637-07-02]	P1	P2,8				
Bromacil	[314-40-9]		10				
Bromine	[7726-95-6]	0,1	0,66	0,3	2,0		
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	5,2			X	
Bromomethane		 See Methyl bromide					
Bromotrifluoromethane	[75-63-8]	1000	6090				
1,3-Butadiene	[106-99-0]	10	22				C2
Butane	[106-97-8]	800	1900				
Butanethiol		 See Butyl mercaptan					
2-Butanone		 See Methyl ethyl ketone (MEK)					
2-Butoxyethanol	[111-76-2]]	25	121			X	
n-Butyl acetate	[123-86-4]	150	713	200	950		
sec-Butyl acetate	[105-46-4]	200	950				
tert-Butyl acetate	[540-88-5]	200	950				
n-Butyl acrylate	[141-32-2]	10	52				
n-Butyl alcohol	[71-36-3]	P50	P152			X	
sec-Butyl alcohol	[78-92-2]	100	303				
tert-Butyl alcohol	[75-65-0]	100	303	150	455		
Butyl celloselve®		 See 2-Butoxy ethanol					
tert-Butyl chromate (as Cr03)	[1189-85-1]		P0,1			X	
n-Butyl glycidyl ether (BGE)	[2426-08-6]	25	133				
n-Butyl lactate	[138-22-7]	5	30				
Butyl mercaptan	[109-79-5]	0,5	1,8				
n-Butylamine	[109-73-9]	P5	P15			X	
o-sec-Butylphenol	[89-72-5]	5	31			X	
p-tert-Butyltoluene	[98-51-1]	10	61	20	122		
Cadmium [7440-43-9], dusts and salts
(as Cd)			
0,.05				
C2
Cadmiun oxide
	Fume (as Cd)
	Production (as Cd)	[1306-19-0]		
P0,05
0,05				
C2
C2
Calcium carbonate	[1317-65-3]		10				[total dust, note 1]	
Calcium cyanamide	[156-62-7]		0,5				
Calcium hydroxide	[1305-62-0]		5				
Calcium oxide	[1305-78-8]		2				
Calcium silicate (synthetic)	[1344-95-2]		10			[total dust, note 1]	
Calcium sulfate	[1778-18-9]		10
5		[total dust, note 1]
[respirable dust, note 1]		
Camphor (synthetic)	[76-22-2]	2	12	3	19		
Caprolactam
	Dust
	Vapour	[105-60-2]	

4,3	
1
20	

8,6	
3
40		
Captafol	[2425-06-1]		0,1			X	
Captan	[133-06-2]		5				
Carbaryl	[63-25-2]		5				
Carbofuran	[1563-66-2]		0,1				
Carbon black	[1333-86-4]		3,5				
Carbon dioxide	[124-38-9]	5000	9000	30000	54000		
Carbon disulfide	[75-15-0]	4	12	12	36	X	
Carbon monoxide	[630-08-0]	35	40	200	230		
Carbon tetrabromide	[588-13-4]	0,1	1,4	0,3	4,1		
Carbon tetrachloride	[56-23-5]	5	31			X	C2
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	23			X	
Cellosolve® acetate		 See 2-Ethoxyethyl acetate					
Cellulose (paper fibres)	[9004-34-6]		10			[total dust, note 1]	
Ceramic (fibres)		 See Fibres-Refractory Fibres					
Celsium hydroxide	[21351-79-1]		2				
Chlordane	[57-74-9]		0,5			X	
Chlorinated camphene	[8001-35-2]		0,5		1	X	C3
Chlorinated diphenyl oxide	[55720-99-5]		0,5				
Chlorine	[7782-50-5]	1	3	3	9		
Chlorine dioxide	[10049-04-4]	0,1	0,28	0,3	0,83		
Chlorine trifluoride	[7790-91-2]	P0,1	P0,38				
2-Chloro-6-(trichloromethyl) pyridine		 See Nitrapyrin					
Chloroacetaldehyde	[107-20-0]	P1	P3,2				
Chloroacetone	[78-95-5]	P1	P3,8			X	
a-Chloroacetophenone	[532-27-4]	0,05	0,32				
Chloroacetyl chloride	[79-04-9]	0,05	0,23	0,15	0,69	X	
Chlorobenzene	[108-90-7]	75	345				
o-chlorobenzylidene malononitrile	[2698-41-1]	P0,05	P0,39			X	
Chlorobromomethane	[74-97-5]	200	1058				
2-Chloro-1,3-butadiene		 See B-chloroprene					
Chlorodifluoromethane	[75-45-6]	1000	3540				
Chlorodiphenyl  (42 % chlorine)	[53469-21-9]		1			X	C2
Chlorodiphenyl  (54 % chlorine)	[11097-69-1]		0,5			X	C2
1-Chloro2,3-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
Chloromethane		 See Methyl chloride					
Chloromethyl methy ether	[107-30-2]						C1
bis (Chloromethyl) ether	[542-88-1]	0,001	0,0047				C1
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				
B-Chloroprene	[126-99-8]	10	36			X	
3-Chloropropene	[107-05-1]	1	3	2	6		
o-Chlorostyrene	[2039-87-4]	50	283	75	425		
o-Chlorotoluene	[95-49-8]	50	259				
Chlorpyrifos	[2921-88-2]		0,2			X	
Chromide ore processing (chromate)
(as Cr)			
0,.05				
C1
Chromium (metal)	[7440-47-3]		0,5				
Chromium (II) compounds (as Cr)			0,5				
Chromium (III) compounds (as Cr)			0,5				
Chromium (VI) compounds (as Cr)
	Certain water insoluble
	Water soluble			
0,05
0,05				
C1
Chromyl chloride	[14977-61-8]	0,025	0,16				
Chrysene	[218-01-9]						C2
Chrysotile		 See Asbestos					
Clopidol	[2971-90-6]		10				
Coal dust
(less than 5 % crystalline silica)	
[53570-85-7]		
2			
[respirable dust]	
Coal dust
(more than 5 % crystalline silica)			
0,1		
[quartz respirable dust]		
Coal tar pitch volatiles, as benzene solubles	
[65996-93-2]		
0,2				
C1
Cobalt [7440-48-4], metal dust and
fume (as Co)			
0,05				
Cobalt hydrocarbonyl (as Co)	[16842-03-8]		0,1				
Cobalt tetracarbonyl (as Co)	[10210-68-1]		0,1				
Continious filament fibres
(fibrous glass)		
 See Fibres-Artificial Vitreous Mineral  Fibres					
Copper [7440-50-8] (as Cu)
	Dust and mists
	Fume			
1
0,2				
Corundum	[1302-74-5]		10			[total dust, note 1]	
Cotton dust, raw			0,5				
Coyden®		 See Clopidol					
Crag®		 See Sesone					
Cresol (all isomers)	[1319-77-3]	5	22			X	
Cristobalite		 See Silica — Crystalline					
Crocidolite		 See Asbestos					
Crotonaldehyde	[4170-30-3]	2	5,7				
Crufomate®	[299-86-5]		5				
Cumene	[98-82-8]	50	246			X	
Cyanamide	[420-04-2]		2				
Cyanides (as CN)			5			X	
Cyanogen	[460-19-5]	10	21				
Cyanogen chloride	[506-77-4]	P0,3	P0,75				
Cyclohexane	[110-82-7]	300	1030				
Cyclohexanol	[108-93-0]	50	206			X	
Cyclohexanone	[108-94-1]	25	100			X	
Cyclohexene	[110-83-8]	300	1010				
Cyclohexylamine	[108-91-8]	10	40				
Cyclonite	[121-82-4]		1,5			X	
Cyclopentadiene	[545-92-7]	75	203				
Cyclopentane	[287-92-3]	600	1720				
Cyhexatin	[13121-70-5]		5				
2,4-D	[94-75-7]		10				C2
DDT
(Dichlorodiphenyltrichloroethane)	
[50-29-3]		
1				
C3
Decaborane	[17702-41-9]	0,05	0,25	0,15	0,75	X	
Demeton®	[8065-48-3]	0,01	0,11			X	
Di-sec-octyl phthalate	[117-81-7]		5		10		C3
2,6-Di-tert-butyl-p-cresol	[128-37-0]		10				
Diacetone alcohol	[123-42-2]	50	238				
4-4'-Diaminodiphenylmethane		 See 4,4'-Methylene dianiline					
1,2-Diaminoethane		 See Ethylenediamine					
Diatomaceous earth		 See Silica — Amorphous					
Diazinon®	[333-41-5]		0,1			X	
Diazomethane	[333-88-3]	0,2	0,34				
Diborane	[19287-45-7]	0,1	0,11				
Dibromodifluoromethane		 See Difluorodibromomethane					
1,2-Dibromoethane	[106-93-4]	20	155			X	C2
Dibrom®		 See Naled					
Dibutyl phosphate	[107-66-4]	1	8,6	2	17		
Dibutyl phthalate	[84-74-2]		5				
2-N-Dibutylaminoethanol	[102-81-8]	2	14			X	
3,3'-Dichloro
4,4'-diaminodiphenylmethane		
 See Methylene bis (2-chloroaniline)					
1,3-Dichloro-5,5-dimethyl hydantoin	[118-52-5]		0,2		0,4		
Dichloroacetylene	[7572-29-4]	P0,1	P0,39				
o-Dichlorobenzene	[95-50-1]	P50	P301			X	
p-Dichlorobenzene	[106-46-7]	75	450	110	660		C3
3,3'-Dichlorobenzidine	[91-94-1]					X	C2
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	400				
1,2-Dichloroethane	[107-06-2]	1	4	2	8		C2
Dichloroethyl ether	[111-44-4]	5	29	10	58	X	
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]	75	350	110	508		
Dichloropropene (isomeres cis and trans)	
[542-75-6]	
1	
4,5			
X	
C3
2,2-Dichloropropionic acid	[75-99-0]	1	5,8				
1,2 Dichloro-1,1,2,2-tetrafluoroethane	[76-14-2]	1000	6990				
Dichlorvos	[62-73-7]	0,1	0,9			X	
Dicrotophos	[141-66-2]		0,25			X	
4,4'-Dicyclohexyl methane
diisocyanate		 See Methylene bis (4-
 cyclohexylisocyanate)					
Dicyclopentadiene	[77-73-6]	5	27				
Dicyclopentadienyl iron	[102-54-5]		10				
Dieldrin	[60-57-1]		0,25			X	
Diethanolamine	[111-42-2]	3	13				
Diethyl ether	[60-29-7]	400	1210	500	1520		
Diethyl ketone	[96-22-0]	200	705				
Diethyl phthalate	[84-66-2]		5				
Diethylamine	[109-89-7]	10	30	25	75		
2-Diethylaminoethanol	[100-37-8]	10	48			X	
Diethylene triamine	[111-40-0]	1	4,2			X	
Di(2-ethylhexyl) phthalate		 See Di-sec-octyl phthalate					
Difluorodibromomethane	[75-61-6]	100	858 				
Diglycidyl ether (DGE)	[2238-07-5]	0,1	0,53				
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			X	
Dimethoxymethane		 See Methylal					
Dimethyl carbamoyl chloride	[79-44-7]						C2
Dimethyl sulfate	[77-78-1]	0,1	0,52			X	C2
2,6-Dimethyl-4-heptanone		 See Diisobutyl ketone					
N,N-Dimethylacetamide	[127-19-5]	10	36			X	
Dimethylamine	[124-40-3]	10	18				
Dimethylaminobenzene		 See Xylidine					
N,N-Dimethylaniline	[126-69-7]	5	25	10	50	Xx	
Dimethylbenzene		 See Xylene					
N,N-Dimethylformamide	[68-12-2]	10	30			X	C2
1,1-Dimethylhydrazine	[57-14-7]	0,5	1,2			X	C2
Dimethylnitrosoamine		 See n-Nitrosodimethylamine					
Dimethylphthalate	[131-11-3]		5				
Dinitolmide	[148-01-6]		5				
Dinitro-ortho-cresol	[534-52-1]		0,2			X	
3,5-Dimitro-ortho-toluamide		 See Dinitolmide					
Dinitrobenzene (all isomers)
[528-29-0; 99-65-0; 100-25-4;
25154-54-4]		

0,15	

1			

X	
Dinitrotoluene	[25321-14-6]		1,5			X	
Dioxane	[123-91-1]	25	90			X	C3
Dioxathion	[78-34-2]		0,2			X	
Diphenyl		 See Biphenyl					
Diphenyl ether		 See Phenyl ether					
Diphenylamine	[122-39-4]		10				
4,4'-Diphenylmethane diisocyanate
(MDI)		 See Methylene bis (4-phenyl
 isocyanate)					
Diquat	[231-36-7]		0,5				
Disulfiram	[97-77-8]		2				
Disulfoton	[298-04-4]		0,1				
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					
Emery	[12415-34-8]		10			[total dust, note 1]	
Endosulfan	[115-29-7]		0,1			X	
Endrin	[72-20-8]		0,1			X	
Enflurane	[13838-16-9]	75	566				
Enzymes, proteolytic		 See Subtilisins					
Epichlorohydrin	[106-89-8]	2	7,6			X	C2
EPN	[2104-64-5]		0,5			X	
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					
Ethanethiol		 See Ethyl mercaptan					
Ethanol		 See Ethyl alcohol					
Ethanolamine		 See 2-Aminoethanol					
Ethion	[563-12-2]		0,4			X	
2-Ethoxyethanol (EGEE)	[110-80-5]	5	18			X	
2-Ethoxyethyl acetate (EGEEA)	[111-15-9]	5	27			X	
Ethyl acetate	[114-78-6]	400	1400				
Ethyl acrylate	[140-88-5]	5	20	15	61		C3
Ethyl alcohol	[64-17-5]	1000	1880				
Ethyl amyl ketone	[541-85-5]	25	131				
Ethyl benzene	[100-41-4]	100	434	125	543		
Ethyl bromide	[74-96-4]	200	891	250	1110		
Ethyl butyl ketone	[106-35-4]	50	234				
Ethyl chloride	[75-00-3]	1000	2640				
Ethyl ether		 See Diethyl ether					
Ethyl formate	[109-94-4]	100	303				
Ethyl mercaptan	[75-08-1]	0,5	1,3				
Ethyl silicate	[78-10-4]	10	85				
Ethylamine	[75-04-7]	10	18				
Ethylene	[74-85-1]	 Simple asphyxiant					
Ethylene bromide		 See Vinyl bromide					
Ethylene chlorohydrin	[107-07-3]	P1	P3,3			X	
Ethylene dibromide		 See 1,2-Dibromoethane					
Ethylene dichloride		 See 1,2-Dichloroethane					
Ethylene glycol (vapour and mist)	 [107-21-1]	P50	P127				
Ethylene glycol dinitrate	[628-96-6]	P0,2	P1,24			X	
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]	0,5	0,88			X	
Ethylene oxide	[75-21-8]	1	1,8				C2
Ethylenediamine	[107-15-3]	10	25				
Ethylglycol acetate		 See 2-Ethoxyethyl acetate					
Ethylidene chloride		 See 1,1-Dichloroethane					
Ethylidene norbornene	[16219-75-3]	P5	P25				
N-Ethylmorpholine	[100-74-3]	5	24			X	
Fenamiphos	[22224-92-6]		0,1			X	
Fensulfothion	[115-90-2]		0,1				
Fenthion	[55-38-9]		0,2			X	
Ferbam	[14484-64-1]		10				
Ferrovanadium (dust)	[12604-58-9]		1		3		
Fibres-Artificial Vitreous Mineral
Fibres (note 4)
	Fibrous glass, continuous filament
	fibres
	Fibrous glass, microfibres
	Insulation wool fibres, Glass wool
	Insulation wool fibres, Rock wool
	Insulation wool fibres, Slag wool
	Refractory fibres (ceramic or
	others)			

10
1 fibre/cm3
2 fibres/cm3
1 fibre/cm3
1 fibre/cm3

1fibre/cm3				

[total dust, note 1]

C3
C2
C2

C3	
Fibres-Natural Mineral Fibres (note 4)
	Attapulgite
	Erionite
	Talc
	Wollastonite	
[12174-11-7]
[66733-21-9]

[13983-17-0]	
1 fibre/cm3
Prohibited use
See Talc (fibrous)
1 fibre/cm3					
C1
C1
Fibres-Organic Synthetic Fibres
	Carbon and graphite fibres			
10
5			
[total dust, note 1]
(respirable dust, note 1]	
Para-aramides fibres (Kevlar®,
Twaron®
Polylefines fibres		 
1 fibre/cm3
10				

[total dust, note 1]	
Fibrous glass dust		 See Fibres-Artificial Vitreous Mineral 	 Fibres					
Fluorides (as F)			2,5				
Fluorine	[7782-41-4]	0,1	0,2				
Fluorotrichloromethane		 See Trichlorofluoromethane					
Fonofos	[944-22-9]		0,1			X	
Formaldehyde	[50-00-0]	P2	P3				C2
Formamide	[75-12-7]	10	18			X	
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]	2	7,9			X	
Furfuryl alcohol	[98-00-0]	10	40	15	60	X	
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]	P0,2	P0,82				
Glycerin (mist)	[56-81-5]		10				
Glycidol	[556-52-5]	25	76				
Glycol monoethyl ether		 See 2-Ethoxy ethanol					
Grain dust (oat, wheat, barley)			4			[total dust, note 1]	
Graphite (fibres)		 See Fibres-Organic Synthetic Fibres					
Graphite (natural)	[7782-42-5]		2,5			[respirable dust, note 1]	
Graphite (synthetic, except fibres)			10			[total dust, note 1]	
Guthion®		 See Azinphosmethyl					
Gypsum	[13397-24-5]		10
5			[total dust, note 1]
[respirable dust, note 1]	
Hafnium	[7440-58-6]		0,5				
Halothane	[151-67-7]	50	404				
Helium	[7440-59-7]	 Simple asphyxiant					
Heptachlor	[76-44-8]		0,5			X	
n-Heptane	[142-82-5]	400	1640	500	2050		
2-Heptanone		 See Methy n-amyl ketone					
3-Heptanone		 See Ethy butyl ketone					
Hexachlorobutadiene	[87-68-3]	0,02	0,21			X	C2
Hexachlorocyclopentadiene	[77-47-4]	0,01	0,11				
Hexachloroethane	[67-72-1]	1	9,7			X	
Hexachloronaphthalene	[1335-87-1]		0,2			X	
Hexafluoroacetone	[684-16-2]	0,1	0,68			X	
Hexamethyl phosphoramide	[680-31-9]					X	C2
Hexamethylene diisocyanate	[822-06-0]	0,005	0,034				
n-Hexane	[110-54-3]	50	176				
Hexane (other isomers)		500	1760	1000	3500		
2-Hexanone		 See Methyl n-butyl ketone					
Hexone		 See Methyl isobutyl ketone					
sec-Hexyl acetate	[108-84-9]	50	295				
Hexylene glycol	[107-41-5]	P25	P121				
Hydrazine	[302-01-2]	0,1	0,13			X	C2
Hydrogen	[1333-74-0]	 Simple asphyxiant					
Hydrogen bromide	[10035-10-6]	P3	P9,9				
Hydrogen chloride	[7647-01-0]	P5	P7,5				
Hydrogen cyanide	[74-90-8]	P10	P11			X	
Hydrogen fluoride (as F)	[7664-39-3]	P3	P2,6				
Hydrogen peroxide	[7722-84-1]	1	1,4				
Hydrogen selenide (as Se)	[7783-07-5]	0,05	0,16				
Hydrogen sulfide	[7783-06-4]	10	14	15	21		
Hydrogenated terphenyls	[61788-32-7]	0,5	4,9				
Hydroquinone	[123-31-9]		2				
Hydroquinone monomethyl ether		 See 4-Methoxy phenol					
4-Hydroxy-4methyl-2-pentanone		 See Diacetone alcohol					
2-Hydroxypropyl acrylate	[999-61-1]	0,5	2,8			X	
2,2'-Iminodiethanol		 See Diethanolamine					
Indene	[95-13-6]	10	48				
Indium [7440-74-6] and compounds
(as In)			
0,1				
Insulation wool fibres		 See Fibres-Artificial Vitreous Mineral Fibres					
Iodine	[7553-56-2]	P0,1	P1,0				
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 acetate	[123-92-2]	100	532				
Isoamyl alcohol	[123-51-3]	100	361	125	452		
Isobutyl acetate	[110-19-0]	150	713				
Isobutyl alcohol	[78-83-1]	50	152				
Isooctyl alcohol	[26952-21-6]	50	266			X	
Isophorone	[78-59-1]	P5	P28				
Isophorone diisocyanate	[4098-71-9]	0,005	0,045				
Isopropoxyethanol	[109-59-1]	25	106			X	
Isopropyl acetate	[108-21-4]	250	1040	310	1290		
Isopropyl alcohol	[67-63-0]	400	985	500	1230		
Isopropyl ether		 See Diisopropyl ether					
Isopropyl glycidyl ether (IGE)	[4016-14-2]	50	238	75	356		
Isopropylamine	[75-31-0]	5	12	10	24		
N-Isopropylaniline	[768-52-5]	2	11			X	
Isopropylbenzene		 See Cumene					
Kaolin	[1332-58-7]		10			[total dust, note 1]	
Ketene	[463-51-4]	0,5	0,86	1,5	2,6		
L.P.G. (Liquified petroleum gas]	[68476-85-7]	1000	1800				
Lead [7439-92-1] and inorganic
compounds, dusts and fumes
(as Pb)			

0,15				
Lead arsenate (as Pb3(AsO4)2)	[3687-31-8]		0,15				
Lead chromate (as Cr)	[7758-97-6]		0,012				C2
Lead tetraethyl (as Pb)	[78-00-2]		0,05			X	
Lead tetramethyl (as Pb)	[75-74-1]		0,05			X	
Limestone		 See Calcium carbonate					
Lindane	[58-89-9]		0,5			X	
Lithium hydride	[7580-67-8]		0,025				
Magnesite	[546-93-0]		10			[total dust, note 1]	
Magnésium oxide fume (as Mg)	[1309-48-4]		10				
Malathion	[121-75-5]		10			X	
Maleic anhydride	[108-31-6]	0,25	1,0				
Manganese (as Mn)
	Dust and compounds
	Fume	[7439-96-5]			
5
1		

3		
Manganese cyclopentadienyl
tricarbonyl (as Mn)	
[12079-65-1]		
0,1			
X	
Manganese methy cyclopentadienyl
tricarbonyl (as Mn)	
[12108-13-3]		
0,2			
X	
Manganese tetroxide	[1317-35-7]		1				
Marble		 See Calcium carbonate					
Mequinol		 See 4-Methoxyphenol					
Mercury [7439-97-6], alkyl
compounds (as Hg)			
0,01		
0,03	
X	
Mercury [7439-97-6], all forms except
alkyl compounds (as Hg)
	Aryl and inorganic compounds
	Mercury vapor			

0,1
0,05			

X
X	
Mesityl oxide	[141-79-7]	10	40				
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]		2,5				
Methoxychlor	[72-43-5]		10				
2-Methoxyethanol (EGME)	[109-86-4]	5	16			X	
2-Methoxyethyl acetate (EGMEA)	[110-49-6]	5	24			X	
4-Methoxyphenol	[150-76-5]		5				
1-Methoxy-2-propanol		 See Propylene glycol momomethyl ether					
Methyl acetate	[79-20-9]	200	606	250	760		
Methyl acetylene	[74-99-7]	1000	1640				
Methyl acetylene-propadiene mixture
(MAPP)	
[59355-75-8]	
1000	
1640	
1250	
2050		
Methyl acrylate	[96-33-3]	10	35			X	
Methyl alcohol	[67-56-1]	200	262	250	328	X	
Methyl amyl alcohol	[108-11-2]	25	104	40	166	X	
Methyl n-amyl ketone	[110-43-0]	50	233				
Methyl bromide	[74-83-9]	5	19			X	
Methyl n-butyl ketone	[591-78-6]	5	20			X	
Methyl cellosolve®		 See 2-Methoxyethanol					
Methyl cellosolve® acetate		 See 2-Methoxyethyl acetate					
Methyl chloride	[74-87-3]	50	103	100	207	X	
Methyl chloroform	[71-55-6]	350	1910	450	2460	X	
Methyl 2-cyanoacrylate	[137-05-3]	2	9,1	4	18		
Methyl demeton	[8022-00-2]		0,5			X	
Methyl ethyl ketone (MEK)	[78-93-3]	50	150	100	300		
Methyl ethyl ketone peroxide	[1338-23-4]	P0,2	P1,5				
Methyl formate	[107-31-3]	100	246	150	369		
Methyl glycol		 See 2-Methoxyethanol					
Methyl glycol acetate		 See 2-Methoxy ethyl acetate					
Methyl hydrazine	[60-34-4]	P0,2	P0,38			X	C2
Methyl iodide	[74-88-4]	2	12			X	C2
Methyl isoamyl ketone	[110-12-3]	50	234				
Methyl isobutyl carbinol		 See Methyl amyl alcohol					
Methyl isobutyl ketone	[108-10-1]	50	205	75	310		
Methyl isocyanate	[624-83-9]	0,02	0,047			X	
Methyl isopropyl ketone	[536-80-4]	200	705				
Methyl mercaptan	[74-93-1]	0,5	0,98				
Methyl methacrylate (monomer)	[80-62-6]	100	410				
Methyl parathion	[298-00-0]		0,2			X	
Methyl propyl ketone	[107-87-9]	150	530				
Methyl silicate	[681-84-5]	1	6				
a-Methyl styrene	[98-83-9]	50	242	100	484		
Methylacrylonitrile	[126-98-7]	1	2,7			x	
Methylal	[109-87-5]	1000	3110				
Methylamine	[74-89-5]	10	13				
N-Methylaniline	[100-61-8]	0,5	2,2			X	
Methylcyclohexane	[108-87-2]	400	1610				
Methylcyclohexanol	[25639-42-3]	50	234				
o-Methylcyclohexanone	[583-60-8]	50	229	75	344	X	
Methylene chloride	[75-09-2]	50	174				C2
4,4'-Methylene bis (2-chloroaniline)
(MOCA)	
[101-14-4]	
0,02	
0,22			
X	
C2
Methylene bis (4-cyclohexylisocyanate)	[5124-30-1]	0,005	0,054				
4-4'-Methylene dianiline	[101-77-9]	0,1	0,81			X	C2
Methylene bis (4-phenyl isocyanate)
(MDI)	
[101-68-8]	
0,005	
0,051				
5-Methyl-3-heptanone		 See Ethyl amyl ketone					
N-Methyl-2,4,6-Trinitrophenyl
nitramine		
 See Tetryl					
Metribuzin	[21087-64-9]		5				
Mevinphos®		 See Phosdrin					
Mica	[12001-26-2]		3			[respirable dust, note 1]	
Microfibres (fibrous glass)		 See Fibres-Artificial Vitreous Mineral Fibres					
Mineral oil (moist)	[8012-95-1]		5		10		
Mineral wool fibres		 See Fibres-Artificial Vitreous Mineral Fibres					
Molybdenum (as Mo)
	Insoluble compounds
	Soluble compounds	[7439-98-7]		
10
5				
Monocrotophos	[6923-22-4]		0,25			X	
Morpholine	[110-91-8]	20	71			X	
Naled	[300-76-5]		3			X	
Naphtha		 See VM & P Naphtha					
Naphthalene	[91-20-3]	10	52	15	79		
B-Naphthylamine	[91-59-8]						C1
a-Naphthylthiourea		 See ANTU					
Nemacur®		 See Fenamiphos					
Neon	[7440-01-9]	 Simple asphyxiant					
Nialate®		 See Ethion					
Nickel
	Metal
	Insoluble compounds (as Ni)
	Soluble compounds (as Ni)	[7440-02-0]		1
1
0,1				
Nickel carbonyl (as Ni)	[13463-39-3]	0,001	0,007				
Nickel sulfide roasting,
	fume and dust (as Ni)			
1				
C1
Nicotine	[54-11-5]		0,5			X	
Nitrapyrin	[1929-82-4]		10		20		
Nitric acid	[7697-37-2]	2	5,2	4	10		
Nitric oxide		 See Nitrogen monoxide					
p-Nitroaniline	[100-01-6]		3			X	
Nitrobenzene	[98-95-3]	1	5			X	
p-Nitrochlorobenzene	[100-00-5]	0,1	0,64			X	
4-Nitrodiphenyl	[92-93-3]					X	C1
Nitroethane	[79-24-3]	100	307				
Nitrogen	[7727-37-9]	 Simple asphyxiant					
Nitrogen dioxide	[10102-44-0]	3	5,6				
Nitrogen monoxide	[10102-43-9]	25	31				
Nitrogen trifluoride	[7783-54-2]	10	29				
Nitroglycerin (NG)	[55-63-0]	P0,2	P1,86			X	
Nitromethane	[75-52-5]	100	250				
1-Nitropropane	[108-03-2]	25	91				
2-Nitropropane	[79-46-9]	10	36				C2
N-Nitrosodimethylamine	[62-75-9]					X	C2
Nitrotoluene (all isomers) [88-72-2;
99-08-1; 99-99-0; 1321-12-6]		
2	
11			
X	
Nitrotrichloromethane		 See Chloropicrin					
							
Nitrous oxide	[10024-97-2]	50	90				
Nonane	[111-82-2]	200	1050				
Nuisance particulates		 See Particulates Not Otherwise
 Classified (PNOC)					
Octachloronaphthale	[2234-13-1]		0,1	0,3		X	
Octane	[111-65-9]	300	1400	375	1750		
Oil mist, mineral		 See Mineral oil (mist)					
Osmium tetroxide (as Os)	[20816-12-0]	0,0002	0,0016	0,0006	0,0048		
Oxalic acid	[144-62-7]		1		2		
Oxygen difluoride	[7783-41-7]	P0,05	P0,11				
Ozone	[10028-15-6]	P0,1	P0,2				
Para-aramides fibres		 See Fibres-Organic Synthetic Fibres					
Paraffin was, fume	[8002-74-2]		2				
Paraquet, respirables particulates	[4685-14-7]	0,1					
Parathion	[56-38-2]		0,1			X	
Particulate polycyclic aromatic
hydrocarbons (PPAH)		
 See Coal tar pitch volatiles					
Particulates Not Otherwise Classified
(PNOC)			
10			
[total dust, note 1]	
Pentaborane	[19624-22-7]	0,005	0,013	0,015	0,039		
Pentachloronaphthalene	[1321-64-8]		0,5			X	
Pentachlorophenol	[87-86-5]		0,5			X	C2
Pentaerythritol	[115-77-5]		10				
n-Pentane	[109-66-0]	120	350				
2-Pentanone		 See Methyl propyl ketone					
3-Pentanone		 See Diethyl ketone					
Perchloroethylene	[127-18-4]	50	339	200	1357		C3
Perchloromethyl mercaptan	[594-42-3]	0,1	0,76				
Perchloryl fluoride	[7616-94-6]	3	13	6	25		
Perfluorodimenthylcetone		 See Hexafluoroacetone					
Perlite	[83969-76-0]		10
5			[total dust, note 1]
[respirable dust, note 1] 	
Petroleum distillates		 See gasoline, Stoddard solvent,  Naphtha VM & P					
Phenacyl chloride		 See a-Chloroacetophenone					
Phenol	[108-95-2]	5	19			X	
Phenothiazine	[92-84-2]		5			X	
Phenyl ether, vapour	[101-84-8]	1	7	2	14		
Phenyl glycidyl ether (PGE)	[122-60-1]	1	6,1				C3
Phenyl mercaptan	[108-98-5]	0,5	2,3				
p-Phenylenediamine	[106-50-3]		0,1			X	
Phenylethylene		 See Styrene (monomer)					
Phenyhydrazine	[100-63-0]	0,1	0,44			X	C2
n-Phenyl-B-naphthylamine	[135-88-6]						C2
Phenylphosphine	[638-21-1]	P0,05	P0,23				
Phorate	[298-02-2]		0,05		0,2	X	
Phosdrin	[7786-34-7]	0,01	0,09	0,03	0,27	X	
Phosgene	[75-44-5]	0,1	0,40				
Phosphine	[7803-51-2]	0,3	0,42	1	1,4		
Phosphoric acid	[7664-38-2]		1		3		
Phosphorus (yellow)	[7723-14-0]	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]	1	6,1				
m-Phthalodinitrile	[626-17-5]		5				
Picloram	[1918-02-1]		10				
Picric acid	[88-89-1]		0,1			X	
Pindone	[83-26-1]		0,1				
Piperazine dihydrochloride	[142-64-3]		5				
Plaster of Paris	[26499-65-0]		10
5			[total dust, note 1]
[respirable dust, note 1]	
Platinum
	Metal
	Soluble salts (as Pt)	[7440-06-4]		
1
0,002				
Polychlorobiphenyls		 See Chlorodiphenyls					
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]		10
5			[total dust, note 1]
[respirable dust, note 1]	
Potassium hydroxide	[1310-58-3]		P2				
Precipitated silica		 See Silica — Amorphous, precipitated					
Propane	[74-98-6]	1000	1800				
Propane sultone	[1120-71-4]						C2
Propanol		 See n-Propyl alcohol					
Propargyl alcohol	[107-19-7]	1	2,3			X	
B-Propiolactone	[57-57-8]	0,5	1,5				C2
Propionic acid	[79-09-4]	10	30				
Propoxur	[114-26-1]		0,5				
n-Propyl acetate	[109-60-4]	200	835	250	1040		
n-Propyl alcohol	[71-23-8]	200	492	250	615	X	
n-Propyl nitrate	[627-13-4]	25	107	40	172		
Propylene	[115-07-1]	 Simple asphyxiant					
Propylene dichloride		 See 1,2-Dichloropropane					
Propylene glycol dinitrate	[6423-43-4]	0,05	0,34			x	
Propylene glycol monomethyl ether	[107-98-2]	100	369	150	553		
Propylene imine	[75-55-8]	2	4,7			X	C2
Propylene oxide	[75-56-9]	20	48				C2
Propyne		 See Methyl acetylene					
Propyne-Propadiene mixture		 See Methyl acetylene-propadiene mixture (MAPP)					
Pyrethrum	[8003-34-7]		5				
Pyridine	[110-86-1]	5	16				
Pyrocatechol		 See Catechol					
Quartz		 See Silica — Crystalline, Quartz					
Quinone		 See p-Benzoquinone					
RDX		 See Cyclonite					
Refractory fibres		 See Fibres-Artificial Vitreous Mineral Fibres					
Resorcinol	[108-46-3]	10	45	20	90		
Rhodium
	Metal and insoluble compounds
	(as Rh)
	Soluble compounds (as Rh)	[7440-16-6]		

0,1
0,001				
Rock wool		 See Fibres-Artificial Vitreous Mineral Fibres					
Ronnel	[299-84-3]		10				
Rosin core solder pyrolysis products
(as Formaldehyde)			
0,1				
Rotenone	[83-79-4]		5				
Rouge			10			[total dust, note 1]	
Rubber solvent (Naphtha]	[8030-30-6]	400	1570				
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 — Amorphous, Diatomaceous
earth (uncalcined)	
[61790-53-2]		
6			
[total dust, note 1]	
Silica — Amorphous, gel	[63231-67-4]		6			[total dust, note 1]	
Silica — Amorphous, precipitated	[1343-98-2]		6			[total dust, note 1]	
Silica — Crystalline, Cristobalite	[14464-46-1]		0,05			[respirable dust]	
Silica — Crystalline, fused	[60676-86-0]		0,1			[respirable dust]	
Silica — Crystalline, Quartz	[14808-60-7]		0,1			[respirable dust],	 C2		
Silica — Crystalline, Tridymite	[15468-32-3]		0,05			[respirable dust]	
Silica — Crystalline, Tripoli	[1317-95-9]		0,1			[respirable dust]	
Silicon	[7440-21-3]		10			[total dust, note 1]	
Silicon carbide (non fibrous)	[409-21-2]		10			[total dust, note 1]	
Silicon tetrahydride	[7803-62-5]	5	6,6				
Silver
	Metal
	Soluble compounds (as Ag)	[7440-22-4]		
0,1
0,01				
Slag wool		 See Fibres-Artificial Vitreous Mineral Fibres					
Soapstone	[14378-12-2]		6
3			[total dust, note 1]
[respirable dust, note 1]	
Sodium azide	[26628-22-8]	P0,11	P0,3				
Sodium bisulfite	[7631-90-5]		5				
Sodium 2,4-dichlorophenoxyethyl
sulfate		 
 See Sesone					
Sodium fluoroacetate	[62-74-8]		0,05		0,15	X	
Sodium hydroxide	[1310-73-2]		P2				
Sodium metabisulfite	[7681-57-4]		5				
Starch	[9005-25-8]		10			[total dust, note 1]	
Stibine (as Sb)	[7803-52-3]	0,1	0,51				
Stoddard solvent	[8052-41-3]	100	525				
Strychnine	[57-24-9]		0,15				
Styrene (monomer]	[100-42-5]	50	213	100	426	X	C3
Subtilisins [1395-21-7; 9014-01-1]
(Proteolytic enzymes as 100 % pure
cystalline enzyme)		

P0,00006					
Sucrose	[57-50-1]		10				
Sulfotep	[3689-24-5]		0,2			X	
Sulfur dioxide	[7446-09-5]	2	5,2	5	13		
Sulfur hexafluoride	[2551-62-4]	1000	5970				
Sulfur monochloride	[10025-67-9]	P1	P5,5				
Sulfur pentafluoride	[5714-22-7]	P0,01	P0,1				
Sulfur tetrafluoride	[7783-60-0]	P0,1	P0,44				
Sulfuric acid	[7664-93-9]		1		3		
Sulfuryl fluoride	[2699-79-8]	5	21	10	42		
Sulprofos	[35400-43-2]		1				
Systox		 See Demeton®					
2,4,5-T	[93-76-5]		10				C2
Talc, fibrous (note 4)		1 fibre/cm3					C1
Talc, non fibrous	[14807-96-6]		3			[respirable dust, note 1]	
Tanalum [7440-25-7], metal
and oxide dusts (as Ta)			
5				
TEDP		 See Sulfotep					
Tellurium [13494-80-9] and compouds
[as Te)			
0,.1				
Tellurium hexafluoride (as Te)	[7783-80-4]	0,02	0,10				
Temephos	[3383-96-8]		10				
TEPP	[107-49-3]	0,004	0,047			X	
Terphenyls	[26140-60-3]	P0,5	P4,7				
1,1,2,2-Tetrabromoethane	[79-27-6]	1	14				
1,1,1,2-Tetrachloro-2,2-difluoroethane	[76-11-9]	500	4170				
1,1,2,2-Tetrachloro-1,2-difluoroethane	[78-12-0]	500	4170				
1,1,2,2-Tetrachloroethane	[79-34-5]	1	6,9			x	
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]	100	300				
Tetramethyl lead		 See Lead, tetramethyl					
Tetramethyl succinonitrile	[3333-52-6]	0,5	2,8			X	
Tetranitromethane	[509-14-8]	1	8				
Tetrasodium pyrophosphate	[7722-88-5]		5				
Tetryl	[479-45-8]		1,5				
Thallium [7440-28-0], soluble
compounds (as T1)			
0,1			
X	
Thimet®		 See Phorate					
4,4'-Thiobis (6-tert-butyl-m-cresol)	[96-69-5]		10				
Thiodan®		 See Endosulfan					
Thiodiphenylamine		 See Phenothiazine					
Thioglycolic acid	[68-11-1]	1	3,8			X	
Thionyl chloride	[7719-09-7]	P1	P5				
Thiram®	[137-26-8]		5				
Tin
	Metal
	Organic compounds (as Sn)
	Oxide and inorganic compounds,
	except SnH4 (as Sn)	[7440-31-5]		
2
0,1

2			

X	
Titanium dioxide	[13463-67-7]		10			[total dust, note 1]	
o-Tolidine	[119-93-7]					X	C2
Toluene	[108-88-3]	100	377	150	565		
Toluene diisocyanate (TDI)
(isomers mixture)	
[26471-62-5]	
0,005	
0,036	
0,02	
0,14		
o-Toluidine	[95-53-4]	2	8,8			X	C2
m-Toluidine	[108-44-1]	2	8,8			X	
p-Toluidine	[106-49-0]	2	8,8			X	C2
Toxaphene		 See Chlorinated camphene					
Tremolite		 See Asbestos					
Tribromomethane		 See Bromoform					
Tributyl phosphate	[126-73-8]	0,2	0,22				
Trichloroacetic acid	[76-03-9]	1	6,7				
1,2,4-Trichlorobenzene	[120-82-1]	P5	P37				
1,1,2-Trichloroethane	(79-00-5]	10	55			X	
1,1,1-Trichloroethane		 See Methyl chloroform					
Trichloroethylene	[79-01-6]	50	269	200	1070		
Trichlorofluoromethane	[75-69-4]	P1000	P5620				
Trichloromethane		 See Chloroform					
Trichloronaphthalene	[1321-65-9]		5			X	
Trichloronitromethane		 See Chloropicrin					
2,4,5-Trichlorophenoxyacetic acid		 See 2,4,5-T					
1,2,3-Trichloropropane	[96-18-4]	10	60			X	
1,1,2-Trichloro-1,2,2-trifluoroethane	[76-13-1]	1000	7670	1250	9590		
Tri-o-cresyl phosphate	[78-30-8]		0,1			X	
Tricyclohexyltin hydroxide		 See Cyhexatin					
Tridymite		 See Silica — Crystalline					
Triethylamine	[121-44-8]	10	41	15	62		
Trifluorobromomethane		 See Bromotrifluoromethane					
Trimellitic anhydride	[552-30-7]	0,005	0,039				
Trimethyl benzene	[25551-13-7]	25	123				
Trimethyl phosphite	[121-45-9]	2	10				
Trimethylamine	[75-50-3]	10	24	15	36		
2,4,6-Trinitrophenol		 See Picric acid					
2,4,6-Trinitrophenylmethylnitramine		 See Tetryl					
2,4,6-Trinitrotoluene (TNT)	[118-96-7]		0,5			X	
Triphenyl amine	[603-34-9]		5				
Triphenyl phosphate	[115-86-6]		3				
Tripoli		 See Silica — Crystalline					
Tungsten (as W)
	Insoluble compounds
	Soluble compounds	[7440-33-7]		
5
1		
10
3		
Turpentine	[8006-64-2]	100	556				
Uranium (natural)
	Insoluble compounds (as U)
	Soluble compounds (as U)	[7440-61-1]		
0,2
0,05		
0,6		
n-Valeraldehyde	[110-62-3]	50	176				
Vanadium pentoxide [1314-62-1],
fume and respirable dust (as V2O5)			
0,05				
Vegetable oil mists (except castor,
cashew and other similar irritant oils)	
[68956-68--3]		
10				
Vinyl acetate	[108-05-4]	10	35	20	70		
Vinyl benzene		 See Styrene					
Vinyl bromide	[593-60-2]	5	22				C2
Vinyl chloride (monomer)	[75-01-4)	1	2,5	5	13		C1
Vinyl cyanide		 See Acrylonitrile					
Vinyl cyclohexene dioxide	[106-87-6]	10	57			X	C2
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]		0,1				
Welding fumes
	(not otherwise classified)			
5				
Wollastonite		 See Fibres-Natural Mineral Fibres					
Wood dust (red cedar)			2,5			[total dust, note 1]	
Wood dust hard and soft,
except red cedar			
5			
[total dust, 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-a, a’-diamine	[1477-55-0]		P0,1			X	
Xylidine (mixed isomers)	[1300-73-8]	0,5	2,5			X	C2
Yttrium [7440-65-5], metal and
compounds (as Y)			
1				
Zinc chloride, fume	[7646-85-7]		1				
Zinc chromates (13530-65-9;
11103-86-9; 37300-23-5] (as Cr)			
0,01				
C1
Zinc stearate	[557-05-1]		10				
Zinc, oxide
	Dust
	Fume	[1314-13-2]		
10
5		

10	
[total dust, note 1]	
Zirconium [7440-67-7] and compounds
(as Zr)			
5		
10		
Zoalene®		 See Dinitolmide					

PART IIDAILY 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 time-weighted average exposure value with respect to a substance listed in Part I of this Schedule.

For that purpose, the method of computation prescribed in the following formula is used:

Time-weighted average exposure value = (in mg/m3 or in ppm)

C1t1 + C2t2 + ... + Cntn

____________________

t1 + t 2 + ... + 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

PART IIIDAILY EXPOSURE TO SEVERAL SUBSTANCES

Where 2 or more substances listed in Part I of this Schedule are present at a 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 = permissible time-weighted average exposure value in accordance with Part I of this Schedule

1, 2, 3 ..., n = indication of substances in the mixture

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

PART IVSUBSTANCES WHICH MAY NOT BE RECIRCULATED

Acrylonitrile or vinyl cyanide

4-Aminodiphenyl

Amitrole or 3-Amino-1,2,4-triazole

Antimony trioxide (production)

Arsenic trioxide (production)

Benzene

Benzidine (production)

Benzo (a) pyrene

Beryllium (metal and compounds)

Bis (Chloromethyl) ether

Cadmium oxide (production)

Chloroform or trichloromethane

Chloromethyl methyl ether

Chromate (Chromite or processing)

Chromium VI (certain water insoluble compounds)

Chrysene

Coal tar pitch volatiles (as benzene solubles)

1,2-Dibromoethane

3,3′-Dichlorobenzidine

3,3′-Dichloro 4,4′ diaminodiphenylmethane or 4,4′-Methylene bis (2-chloroaniline)

Dimethyl carbomoyl chloride

1,1-Dimethylhydrazine

Dimethyl sulfate

Epichlorohydrin

Ethylene oxide

Hexachlorobutadiene

Hexamethyl phosphoramide

Hydrazine

Lead chromate

Methyl hydrazine

B-Naphthylamine

Nickel sulfide roasting

4-Nitrodiphenyl

2-Nitropropane

N-Nitrosodimethylamine

n-Phenyl-B-naphthylamine

Propane sultone

B-Propiolactone

o-Tolidine

Vinyl chloride (monomer) or Chloroethylene

Vinyl cyclohexene dioxide

Zinc chromates

PART VSUBSTANCES TO WHICH EXPOSURE MUST BE REDUCED TO A MINIMUM

C1 CARCINOGENS

4-Aminodiphenyl

Asbestos (actinolite, amosite, anthophyllite, chrysotile, crocidolite, tremolite)

Attapulgite

Benzene

Benzidine (production)

Bis (Chloromethyl) ether

Chloromethyl methyl ether

Chromate (chromite ore processing)

Chromium VI (certain water insoluble compounds)

Coal tar pitch volatiles (as benzene solubles)

B-Naphthylamine

Nickel sulfide roasting (fume and dust)

4-Nitrodiphenyl

Talc (fibrous)

Vinyl chloride (monomer)

Zinc chromates

C2 CARCINOGENS

Acrylamide

Acrylonitrile

Antimony trioxide (production)

Arsenic trioxide (production)

Benzo (a) pyrene

Beryllium (metal and compounds)

1,3-Butadiene

Cadmium dusts and salts

Cadmium oxide (fume)

Cadmium oxide (production)

Carbon tetrachloride

Chlorodiphenyl (42% C1)

Chlorodiphenyl (54% C1)

Chloroform

Chrysene

2,4-D

4,4′-Diaminodiphenylmethane

1,2-Dibromoethane

3,3′-Dichlorobenzidine

3,3′-Dichloro4,4′-diaminodiphenylmethane

1,2-Dichloroethane

Dimethyl carbamoyl chloride

N,N-Dimethylformamide

1,1-Dimethylhydrazine

Dimethyl sulfate

Epichlorohydrin

Ethylene oxide

Formaldehyde

Hexachlorobutadiene

Hexamethyl phosphoramide

Hydrazine

Lead chromate

Methyl chloride

Methyl hydrazine

Methyl iodide

2-Nitropropane

N-Nitrosodimethylamine

Pentachlorophenol

n-Phenyl-B-naphthylamine

Phenylhydrazine

Propane sultone

B-Propiolactone

Propylene imine

Propylene oxide

Rock wool

Silica-crystalline, quartz

Slag wool

2,4,5-T

o-Tolidine

o-Toluidine

p-Toluidine

Vinyl bromide

Vinyl cyclohexene dioxide

Xylidine (mixed isomers)

ISOCYANATES

4,4′-Dicyclohexyl methane diisocyanate

4,4′-Diphenylmethane diisocyanate

Hexamethylene diisocyanate

Isocyanate oligomers

Isophorone diisocyanate

Toluene diisocyanate (TDI) (isomer mixture)

R.R.Q., 1981, c. S-2.1, r. 15, Sch. A; O.C. 1248-94, s. 10; Erratum, 1994 G.O. 2, 4125; Erratum, 1994 G.O. 2, 4255; O.C. 55-99, ss. 11 and 13.