Occupational Health and Safety Code

The Occupational Health and Safety Code provides specific technical health and safety rules and requirements for Alberta workplaces.

Alberta Regulation 191/2021

Schedule 1 Chemical Substances

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Contents

Table 1 Substances and processes requiring a code of practice
Table 2 Occupational exposure limits for chemical substances
 

Table 1
 Substances and processes requiring a code of practice

[See section 26(1)]

 

Arsenic and arsenic compounds

Asbestos

Benzene

Beryllium

1,3 Butadiene

Cadmium

Coal tar pitch volatiles

1,2 Dibromoethane (Ethylene dibromide)

Ethylene oxide

Hexachlorobutadiene

Hydrazines

Hydrogen sulphide

Isocyanates

Lead and lead compounds

Methyl bromide

Methyl hydrazine

Perchlorates

Silica crystalline, respirable

Styrene in styrene resin fabrication

Vinyl chloride (Chloroethylene)

Zinc chromate

 

Table 2
 Occupational exposure limits for chemical substances

 

(1)

A person using this Table may apply either the “mg/m3” or “ppm” measure defined as follows:

“mg/m3” means milligrams of substance per cubic metre of air measured at ambient work site conditions;

“ppm” (parts per million) means parts of a vapour or gas by volume at standard conditions (25ºC and an absolute barometric pressure of 101.3 kilopascals) per parts of contaminated air by volume at ambient work site conditions.

(2)

“f/cc” means fibres per cubic centimetre of air; “CAS” means Chemical Abstracts Service.

(3)

The numbers 1, 2 and 3 in the “Substance Interaction” column have the following meanings:

1 — substance may be readily absorbed through intact skin;

2 — substance is a simple asphyxiant that may create an atmosphere deficient in oxygen; available oxygen in the range of 19.5 percent to 23 percent by volume must be present;

3 — occupational exposure limit is based on irritation effects and its adjustment to compensate for unusual work schedules is not required.

(4)

A carcinogen is defined as “an agent capable of inducing benign or malignant neoplasms.” Based on the weight of evidence from epidemiologic studies, “A1” would be a Confirmed Human Carcinogen and means that the agent is carcinogenic to humans. “A2” would be a Suspected Human Carcinogen and means that human data are accepted as adequate in quality but are conflicting or insufficient to classify the agent as A1 (American Conference of Governmental Industrial Hygienists).

 

 

Substance CAS
number		 8‑hour
occupational
exposure limit		 15‑minute or
ceiling (c) occupational exposure limit		 Substance interaction
1, 2, 3		 Carcinogenicity
A1, A2
ppm mg/m3 f/cc ppm mg/m3    
Acetaldehyde 75‑07‑0 ‑ ‑ ‑ (c) 25 (c) 45 3  
Acetic acid 64‑19‑7 10 25 ‑ 15 37 ‑  
Acetic anhydride 108‑24‑7 ‑ ‑ ‑ (c) 5 (c) 21 3  
Acetone 67‑64‑1 500 1200 ‑ 750 1800 ‑  
Acetone cyanohydrin 75‑86‑5 ‑ ‑ ‑ ‑ (c) 5 1  
Acetonitrile 75‑05‑8 20 34 ‑ ‑ ‑ 3  
Acetophenone 98‑86‑2 10 49 ‑ ‑ ‑ 3  
Acetylene 74‑86‑2 ‑ ‑ ‑ ‑ ‑ 2  
Acetylene dichloride
(1,2‑Dichloroethylene)		 540‑59‑0
156‑59‑2
156‑60‑5		 200 793 ‑ ‑ ‑ ‑  
Acetylene tetrabromide
(1,1,2,2‑Tetrabromoethane)		 79‑27‑6 0.1 1.4 ‑ ‑ ‑ ‑  
Acetylene tetrachloride
(1,1,2,2‑Tetrachloroethane)		 79‑34‑5 1 6.9 ‑ ‑ ‑ 1  
Acetylsalicylic acid (Aspirin) 50‑78‑2 ‑ 5 ‑ ‑ ‑ 3  
Acrolein 107‑02‑8 ‑ ‑ ‑ (c) 0.1 (c) 0.2 1  
Acrylamide 79‑06‑1 ‑ 0.03 ‑ ‑ ‑ 1  
Acrylic acid 79‑10‑7 2 5.9 ‑ ‑ ‑ 1,3  
Acrylic acid, n‑butyl ester (n‑Butyl acrylate) 141‑32‑2 2 10 ‑ ‑ ‑ 3  
Acrylic acid, ethyl ester (Ethyl acrylate) 140‑88‑5 5 20 ‑ 15 61 ‑  
Acrylic acid, methyl ester (Methyl acrylate) 96‑33‑3 2 7 ‑ ‑ ‑ 1  
Acrylonitrile (Vinyl cyanide) 107‑13‑1 2 4.3 ‑ ‑ ‑ 1  
Adipic acid 124‑04‑9 ‑ 5 ‑ ‑ ‑ ‑  
Adiponitrile 111‑69‑3 2 8.8 ‑ ‑ ‑ 1  
Aldrin 309‑00‑2 ‑ 0.25 ‑ ‑ ‑ 1  
Aliphatic Hydrocarbon gases, Alkane (C2‑C4) ‑ 1000 ‑ ‑ ‑ ‑ ‑ ‑
Allyl alcohol 107‑18‑6 0.5 1.2 ‑ ‑ ‑ 1, 3  
Allyl chloride 107‑05‑1 1 3.1 ‑ 2 6.2 ‑  
Allyl glycidyl ether 106‑92‑3 1 4.7 ‑ ‑ ‑ ‑  
Allyl propyl disulfide 2179‑59‑1 0.5 3 ‑ ‑ ‑ 3  
Alumina (Aluminum oxide) 1344‑28‑1 ‑ 10 ‑ ‑ ‑ ‑  
Aluminum Metal Dust Pyro powders, as Al Soluble salts, as Al Alkyls, not otherwise specified as Al 7429‑90‑5
‑
‑
‑
‑
10
5
2
2		 ‑
‑
‑
‑
‑
‑
‑
‑
‑
3
‑
3
3		  
Aluminum oxide (Alumina) 1344‑28‑1 ‑ 10 ‑ ‑ ‑ ‑  
Aminoethanol (Ethanolamine) 141‑43‑5 3 7.5 ‑ 6 15 3  
Aminopyridine 504‑29‑0 0.5 1.9 ‑ ‑ ‑ ‑  
Amino‑1,2,4 triazole (Amitrole) 61‑82‑5 ‑ 0.2 ‑ ‑ ‑ ‑  
Amitrole 61‑82‑5 ‑ 0.2 ‑ ‑ ‑ ‑  
Ammonia 7664‑41‑7 25 17 ‑ 35 24 ‑  
Ammonium chloride fume 12125‑02‑9 ‑ 10 ‑ ‑ 20 3  
Ammonium perfluorooctanoate 3825‑26‑1 ‑ 0.01 ‑ ‑ ‑ 1  
Ammonium persulfate (Persulfates) 7727‑54‑0 ‑ 0.1 ‑ ‑ ‑ 3  
Ammonium sulfamate 7773‑06‑0 ‑ 10 ‑ ‑ ‑ ‑  
Amosite (Asbestos) 12172‑73‑5 ‑ ‑ 0.1 ‑ ‑ ‑ A1
n‑Amyl acetate (1‑Pentyl acetate) 628‑63‑7 50 266 ‑ 100 532 3  
Sec‑Amyl acetate (2‑Pentyl acetate) 626‑38‑0 50 266 ‑ 100 532 3  
Tert‑Amyl acetate
(1,1‑dimethylpropyl acetate)		 625‑16‑1 50 266 ‑ 100 532 3  
Aniline 62‑53‑3 2 7.6 ‑ ‑ ‑ 1  
o‑Anisidine 90‑04‑0 ‑ 0.5 ‑ ‑ ‑ 1  
p‑Anisidine 104‑94‑9 ‑ 0.5 ‑ ‑ ‑ 1  
Antimony & compounds, as Sb 7440‑36‑0 ‑ 0.5 ‑ ‑ ‑ 3  
Antimony hydride 7803‑52‑3 0.1 0.5 ‑ ‑ ‑ ‑  
ANTU (α‑Naphthylthiourea) 86‑88‑4 ‑ 0.3 ‑ ‑ ‑ ‑  
Argon 7440‑37‑1 ‑ ‑ ‑ ‑ ‑ 2  
Arsenic, elemental & inorganic compounds as As 7440‑38‑2 ‑ 0.01 ‑ ‑ ‑ ‑ A1
Arsine 7784‑42‑1 0.05 0.2 ‑ ‑ ‑ ‑  
Asbestos, all forms 1332‑21‑4 12172‑73‑5 12001‑29‑5 12172‑67‑7 ‑ ‑ 0.1 ‑ ‑ ‑ A1
Asphalt (Petroleum; Bitumen) fume 8052‑42‑4 ‑ 5 ‑ ‑ ‑ 3  
Atrazine 1912‑24‑9 ‑ 5 ‑ ‑ ‑ 3  
Azinphos‑methyl (Guthion) 86‑50‑0 ‑ 0.2 ‑ ‑ ‑ 1  
Barium and soluble compounds, as Ba 7440‑39‑3 ‑ 0.5 ‑ ‑ ‑ ‑  
Barium sulfate 7727‑43‑7 ‑ 10 ‑ ‑ ‑ ‑  
Benomyl 17804‑35‑2 0.84 10 ‑ ‑ ‑ 3  
Benzene 71‑43‑2 0.5 1.6 ‑ 2.5 8 1 A1
p‑Benzoquinone (Quinone) 106‑51‑4 0.1 0.4 ‑ ‑ ‑ ‑  
Benzotrichloride (Benzyl trichloride) 98‑07‑7 ‑ ‑ ‑ (c) 0.1 (c) 0.8 1 A2
Benzoyl chloride 98‑88‑4 ‑ ‑ ‑ (c) 0.5 (c) 2.9 3  
Benzoyl peroxide 94‑36‑0 ‑ 5 ‑ ‑ ‑ 3  
Benzyl acetate 140‑11‑4 10 61 ‑ ‑ ‑ 3  
Benzyl chloride 100‑44‑7 1 5.2 ‑ ‑ ‑ 3  
Benzyl trichloride (Benzotrichloride) 98‑07‑7 ‑ ‑ ‑ (c) 0.1 (c) 0.8 1 A2
Beryllium and compounds, as Be 7440‑41‑7 ‑ 0.002 ‑ ‑ 0.01 ‑ A1
Biphenyl (Diphenyl) 92‑52‑4 0.2 1.3 ‑ ‑ ‑ ‑  
Bis (2‑dimethylaminoethyl) ether 3033‑62‑3 0.5 0.3 ‑ 0.15 0.9 1,3  
Bismuth telluride Undoped, as Bi2Te3 Se‑doped, as Bi2Te3 1304‑82‑1  
‑
‑		  
10
5		  
‑
‑		  
‑
‑		  
‑
‑		  
‑
‑		  
Bitumen
(Asphalt fume)		 8052‑42‑4 ‑ 5 ‑ ‑ ‑ 3  
Borates, tetra, sodium salts,
Anhydrous Decahydrate Pentahydrate		 1303‑96‑4
‑
‑
‑
1
1
1		 ‑
3
3
3
‑
‑
‑		 3  
Boron oxide 1303‑86‑2 ‑ 10 ‑ ‑ ‑ 3  
Boron tribromide 10294‑33‑4 ‑ ‑ ‑ (c) 1 (c) 10 ‑  
Boron trifluoride 7637‑07‑2 ‑ ‑ ‑ (c) 1 (c) 2.8 ‑  
Bromacil 314‑40‑9 ‑ 10 ‑ ‑ ‑ ‑  
Bromine 7726‑95‑6 0.1 0.7 ‑ 0.2 1.3 ‑  
Bromine pentafluoride 7789‑30‑2 0.1 0.7 ‑ ‑ ‑ 3  
Bromochloromethane
(Chlorobromomethane)		 74‑97‑5 200 1060 ‑ ‑ ‑ ‑  
Bromoethane (Ethyl bromide) 74‑96‑4 5 22 ‑ ‑ ‑ 1  
Bromoform (Tribromomethane) 75‑25‑2 0.5 5.2 ‑ ‑ ‑ 1  
1‑Bromopropane 106‑44‑5 10 50 ‑ ‑ ‑ ‑  
Bromotrifluoromethane
(Trifluorobromomethane)		 75‑63‑8 1000 6090 ‑ ‑ ‑ ‑  
1,3‑Butadiene 106‑99‑0 2 4.4 ‑ ‑ ‑ ‑ A2
Butane 106‑97‑8 1000 ‑ ‑ ‑ ‑ ‑  
Butanethiol (n‑tyl mercaptan) 109‑79‑5 0.5 1.8 ‑ ‑ ‑ 3  
n‑Butanol (n‑Butyl alcohol) 71‑36‑3 20 60 ‑ ‑ ‑ 3  
sec‑Butanol (sec‑Butyl alcohol) 78‑92‑2 100 303 ‑ ‑ ‑ ‑  
tert‑Butanol (tert‑Butyl alcohol) 75‑65‑0 100 303 ‑ ‑ ‑ ‑  
2‑Butanone (Methyl ethyl ketone) 78‑93‑3 200 590 ‑ 300 885 ‑  
3‑Buten‑2‑one (Methyl vinyl ketone) 78‑94‑4 ‑ ‑ ‑ (c) 0.2 (c) 0.6 1  
2‑Butoxyethanol
(Ethylene glycol monobutyl ether)		 111‑76‑2 20 97 ‑ ‑ ‑ 3  
n‑Butoxyethyl acetate 112‑07‑2 20 131 ‑ ‑ ‑ ‑  
n‑Butyl acetate 123‑86‑4 150 713 ‑ 200 950 3  
sec‑Butyl acetate 105‑46‑4 200 950 ‑ ‑ ‑ 3  
tert‑Butyl acetate 540‑88‑5 200 950 ‑ ‑ ‑ 3  
n‑Butyl acrylate 141‑32‑2 2 10 ‑ ‑ ‑ ‑  
n‑Butylamine 109‑73‑9 ‑ ‑ ‑ (c) 5 (c) 15 1  
Butylated hydroxytoluene (BHT)
(2,6‑Di‑tert‑butyl‑p‑cresol)		 128‑37‑0 ‑ 10 ‑ ‑ ‑ 3  
tert‑Butyl chromate as CrO3 1189‑85‑1 ‑ ‑ ‑ ‑ (c) 0.1 1  
n‑Butyl glycidyl ether 2426‑08‑06 3 16 ‑ ‑ ‑ 1  
n‑Butyl lactate 138‑22‑7 5 30 ‑ ‑ ‑ ‑  
Butyl mercaptan (Butanethiol) 109‑79‑5 0.5 1.8 ‑ ‑ ‑ 3  
o‑sec‑Butylphenol 89‑72‑5 5 31 ‑ ‑ ‑ 1, 3  
p‑tert‑Butyltoluene 98‑51‑1 1 6.1 ‑ ‑ ‑ ‑  
Cadmium, elemental
Cadmium compounds as Cd, respirable		 7440‑43‑9   0.01 0.002 ‑
‑		 ‑ ‑ ‑ A2 A2
Calcium carbonate
(Aragonite, Calcite, Marble, Vaterite)		 1317‑65‑3
471‑34‑1		 ‑ 10 ‑ ‑ ‑ 3  
Calcium chromate, as Cr 13756‑19‑0 ‑ 0.001 ‑ ‑ ‑ ‑ A2
Calcium cyanamide 156‑62‑7 ‑ 0.5 ‑ ‑ ‑ 3  
Calcium hydroxide 1305‑62‑0 ‑ 5 ‑ ‑ ‑ 3  
Calcium oxide 1305‑78‑8 ‑ 2 ‑ ‑ ‑ 3  
Calcium silicate, (synthetic, nonfibrous) 1344‑95‑2 ‑ 10 ‑ ‑ ‑ 3  
Calcium sulphate
(Plaster of Paris, Gypsum)		 7778‑18‑9
26499‑65‑0
13397‑24‑5		 ‑ 10 ‑ ‑ ‑ ‑  
Camphor, synthetic 76‑22‑2 2 12 ‑ 3 19 ‑  
Caprolactam 105‑60‑2 ‑ 5 ‑ ‑ ‑ ‑  
Captafol 2425‑06‑1 ‑ 0.1 ‑ ‑ ‑ 1,3  
Captan 133‑06‑2 ‑ 5 ‑ ‑ ‑ 3  
Carbaryl (Sevin®) 63‑25‑2 ‑ 5 ‑ ‑ ‑ ‑  
Carbofuran 1563‑66‑2 ‑ 0.1 ‑ ‑ ‑ ‑  
Carbon black 1333‑86‑4 ‑ 3.5 ‑ ‑ ‑ ‑  
Carbon dioxide 124‑38‑9 5000 9000 ‑ 30,000 54,000 ‑  
Carbon disulfide 75‑15‑0 1 3.1 ‑ ‑ ‑ 1  
Carbon monoxide 630‑08‑0 25 29 ‑ ‑ ‑ ‑  
Carbon tetrabromide 558‑13‑4 0.1 1.4 ‑ 0.3 4.1 ‑  
Carbon tetrachloride
(Tetrachloromethane)		 56‑23‑5 5 31 ‑ 10 63 1 A2
Carbonyl chloride (Phosgene) 75‑44‑3 0.1 0.4 ‑ ‑ ‑ ‑  
Carbonyl fluoride 353‑50‑4 2 5.4 ‑ 5 13 ‑  
Catechol 120‑80‑9 5 23 ‑ ‑ ‑ 1  
Cellulose 9004‑34‑6 ‑ 10 ‑ ‑ ‑ 3  
Cesium hydroxide 21351‑79‑1 ‑ 2 ‑ ‑ ‑ 3  
Chlordane 57‑74‑9 ‑ 0.5 ‑ ‑ ‑ 1  
Chlorinated camphene (Toxaphene) 8001‑35‑2 ‑ 0.5 ‑ ‑ 1 1  
Chlorinated diphenyl oxide 31242‑93‑0 ‑ 0.5 ‑ ‑ ‑ ‑  
Chlorine 7782‑50‑5 0.5 1.5 ‑ 1 2.9 3  
Chlorine dioxide 10049‑04‑4 0.1 0.3 ‑ 0.3 0.8 ‑  
Chlorine trifluoride 7790‑91‑2 ‑ ‑ ‑ (c) 0.1 (c) 0.4 ‑  
Chloroacetaldehyde 107‑20‑0 ‑ ‑ ‑ (c) 1 (c) 0.4 3  
Chloroacetone 78‑95‑5     ‑ (c) 1 (c) 3.8 1, 3  
2‑Chloroacetophenone (Phenacyl chloride) 532‑27‑4 0.05 0.3 ‑ ‑ ‑ 3  
Chloroacetyl chloride 79‑04‑9 0.05 0.2 ‑ 0.15 0.7 1,3  
Chlorobenzene 108‑90‑7 10 46 ‑ ‑ ‑ ‑  
o‑Chlorobenzylidene malononitrile 2698‑41‑1 ‑ ‑ ‑ (c) 0.05 (c) 0.4 1  
Chlorobromomethane 74‑97‑5 200 1060 ‑ ‑ ‑ ‑  
2‑Chloro‑1,3‑butadiene (β‑Chloroprene) 126‑99‑8 10 36 ‑ ‑ ‑ 1,3  
Chlorodifluoromethane 75‑45‑6 1000 3500 ‑ ‑ ‑ ‑  
Chlorodiphenyl
(42 percent chlorine)
(PCBs, Polychlorinated biphenyls –
42 percent chlorine)		 53469‑21‑9 ‑ 1 ‑ ‑ ‑ 1  
Chlorodiphenyl
(54 percent chlorine)
(PCBs, Polychlorinated biphenyls
54 percent chlorine)		 11097‑69‑1 ‑ 0.5 ‑ ‑ ‑ 1  
1‑Chloro,2,3‑epoxy‑propane (Epichlorohydrin) 106‑89‑8 0.5 1.9 ‑ ‑ ‑ 1  
Chloroethane (Ethyl chloride) 75‑00‑3 100 264 ‑ ‑ ‑ 1  
2‑Chloroethanol (Ethylene chlorohydrin) 107‑07‑3 ‑ ‑ ‑ (c) 1 (c) 3.3 1  
Chloroethylene (Vinyl chloride) 75‑01‑4 1 2.6 ‑ ‑ ‑ ‑ A1
Chloroform (Trichloromethane) 67‑66‑3 10 49 ‑ ‑ ‑ ‑  
Bis(Chloromethyl) ether 542‑88‑1 0.001 0.005 ‑ ‑ ‑ ‑ A1
p‑Chloronitrobenzene (p‑Nitrochlorobenzene) 100‑00‑5 0.1 0.6 ‑ ‑ ‑ 1  
1‑Chloro‑1‑nitropropane 600‑25‑9 2 10 ‑ ‑ ‑ ‑  
Chloropentafluoroethane 76‑15‑3 1000 6300 ‑ ‑ ‑ ‑  
Chloropicrin (Trichloronitromethane) 76‑06‑2 0.1 0.7 ‑ ‑ ‑ ‑  
1‑Chloro‑2‑propanol and 2‑Chloro‑1‑propanol 127‑00‑4 78‑89‑7 1 4 ‑ ‑ ‑ 1  
β‑Chloroprene 126‑99‑8 10 36 ‑ ‑ ‑ 1,3  
2‑Chloropropionic acid 598‑78‑7 0.1 0.4 ‑ ‑ ‑ 1  
o‑Chlorostyrene 2039‑87‑4 50 283 ‑ 75 425 ‑  
o‑Chlorotoluene 95‑49‑8 50 259 ‑ ‑ ‑ 3  
2‑Chloro‑6‑(trichloromethyl) pyridine
(Nitrapyrin)		 1929‑82‑4 ‑ 10 ‑ ‑ 20 ‑  
Chlorpyrifos 2921‑88‑2 ‑ 0.1 ‑ ‑ ‑ 1  
Chromite ore processing (Chromate),
as Cr		 ‑ ‑ 0.05 ‑ ‑ ‑ ‑ A1
Chromium, metal and inorganic compounds, as Cr Metal and Cr III compounds Water‑soluble Cr VI compounds Insoluble Cr VI compounds 7440‑47‑3    

‑
‑
‑

0.5
0.05
0.01

‑
‑
‑

‑
‑
‑

‑
‑
‑

3
‑
‑


A1
A1
Chromyl chloride 14977‑61‑8 0.025 0.2 ‑ ‑ ‑ 3  
Chrysotile
(Asbestos)		 12001‑29‑5 ‑ ‑ 0.1 ‑ ‑ ‑ A1
Clopidol 2971‑90‑6 ‑ 10 ‑ ‑ ‑ 3  
Coal dust (Respirable particulate)
This limit expires on July1, 2010 and is replaced by the exposure limit shown below		   ‑ 2 ‑ ‑ ‑ ‑ ‑
Coal dust (Respirable particulate) Anthracite Bituminous These limits come into effect on July 1, 2010   ‑   0.4 0.9 ‑ ‑ ‑ ‑  
Coal tar pitch volatiles, as benzene solubles 65996‑93‑2 ‑ 0.2 ‑ ‑ ‑ ‑ A1
Cobalt, elemental inorganic compounds, as Co 7440‑48‑4 ‑ 0.02 ‑ ‑ ‑ ‑  
Cobalt carbonyl, as Co 10210‑68‑1 ‑ 0.1   ‑ ‑ ‑  
Cobalt hydrocarbonyl, as Co 16842‑03‑8 ‑ 0.1 ‑ ‑ ‑ ‑  
Copper Fume Dusts/mists, as Cu 7440‑50‑8  
‑
‑
0.2
1		 ‑
‑
‑
‑
‑
‑
‑		  
Cotton, dust, raw   ‑ 0.2 ‑ ‑ ‑ ‑  
Coumaphos (mg/m3) 56‑72‑4   0.5 ‑ ‑ ‑ 1  
Cresol, all isomers 1319‑77‑3
95‑48‑7
108‑39‑4
106‑44‑5		 5 22 ‑ ‑ ‑ 1  
Cristobalite, respirable
(Silica, crystalline)		 14464‑46‑1 ‑ 0.025 ‑ ‑ ‑ ‑ A2
Crocidolite (Asbestos) 12001‑28‑4 ‑ ‑ 0.1 ‑ ‑ ‑ A1
Crotonaldehyde 4170‑30‑3 ‑ ‑ ‑ (c) 0.3 (c) 0.9 1, 3  
Cruformate 299‑86‑5 ‑ 5 ‑ ‑ ‑ ‑  
Cumene 98‑82‑8 50 246 ‑ ‑ ‑ ‑  
Cyanamide 420‑04‑2 ‑ 2 ‑ ‑ ‑ 3  
Cyanide and Cyanide salts and hydrogen cyanide as CN Hydrogen cyanide Calcium cyanide Potassium cyanide Sodium cyanide

74‑90‑8
592‑01‑8
151‑50‑8
143‑33‑9

‑
‑
‑
‑

‑
‑
‑
‑		     ‑
‑
‑
‑

(c) 4.7
‑
‑
‑

(c) 5.2
(c) 5
(c) 5
(c) 5

1
1
1
1		  
Cyanogen 460‑19‑5 10 21 ‑ ‑ ‑ 3  
Cyanogen chloride 506‑77‑4 ‑ ‑ ‑ (c) 0.3 (c) 0.8 ‑  
Cyclohexane 110‑82‑7 100 344 ‑ ‑ ‑ ‑  
Cyclohexanol 108‑93‑0 50 205 ‑ ‑ ‑ 1  
Cyclohexanone 108‑94‑1 20 80 ‑ 50 200 1  
Cyclohexene 110‑83‑8 300 1010 ‑ ‑ ‑ 3  
Cyclohexylamine 108‑91‑8 10 41 ‑ ‑ ‑ 3  
Cyclonite (RDX) 121‑82‑4 ‑ 0.5 ‑ ‑ ‑ 1  
Cyclopentadiene 542‑92‑7 75 203 ‑ ‑ ‑ 3  
Cyclopentane 287‑92‑3 600 1720 ‑ ‑ ‑ ‑  
Cyhexatin (Tricyclohexyltin hydroxide) 13121‑70‑5 ‑ 5 ‑ ‑ ‑ ‑  
2,4‑D (2,4‑Dichlorophenoxyacetic acid) 94‑75‑7 ‑ 10 ‑ ‑ ‑ 3  
DDT (Dichlorodiphenyl trichloroethane) 50‑29‑3 ‑ 1 ‑ ‑ ‑ ‑  
Decaborane 17702‑41‑9 0.05 0.3 ‑ 0.15 0.8 1  
Demeton (Systox®) 8065‑48‑3 ‑ 0.05 ‑ ‑ ‑ 1  
Demeton‑s‑methyl (Methyl demeton) 8022‑00‑2 ‑ 0.05 ‑ ‑ ‑ 1  
Diacetone alcohol (4‑Hydroxyl‑4‑methyl‑2‑pentanone) 123‑42‑2 50 238 ‑ ‑ ‑ 3  
4,4‑Diaminodiphenyl‑methane (4,4’‑Methylene dianiline) 101‑77‑9 0.1 0.8 ‑ ‑ ‑ 1  
1,2‑Diaminoethane (Ethylenediamine) 107‑15‑3 10 25 ‑ ‑ ‑ 1  
Diazinon 333‑41‑5 ‑ 0.01 ‑ ‑ ‑ 1  
Diazomethane 334‑88‑3 0.2 0.3 ‑ ‑ ‑ ‑ A2
Dibenzoyl peroxide (Benzoyl peroxide) 94‑36‑0 ‑ 5 ‑ ‑ ‑ 3  
Diborane 19287‑45‑7 0.1 0.1 ‑ ‑ ‑ ‑  
Dibrom (Naled) 300‑76‑5 ‑ 0.1 ‑ ‑ ‑ 1  
2‑N‑Dibutylaminoethanol 102‑81‑8 0.5 3.5 ‑ ‑ ‑ 1,3  
2,6‑Di‑tert‑butyl‑p‑cresol (Butylated hydroxytoluene, BHT) 128‑37‑0 ‑ 10 ‑ ‑ ‑ 3  
Dibutyl phenyl phosphate 2528‑36‑1 0.3 3.5 ‑ ‑ ‑ 1  
Dibutyl phosphate 107‑66‑4 1 8.6 ‑ 2 17 ‑  
Dibutyl phthalate 84‑74‑2 ‑ 5 ‑ ‑ ‑ ‑  
Dichloroacetic acid 79‑43‑6 0.5 2.6 ‑ ‑ ‑ 1  
Dichloroacetylene 7572‑29‑4 ‑ ‑ ‑ (c) 0.1 (c) 0.4 ‑  
o‑Dichlorobenzene (1,2‑Dichlorobenzene) 95‑50‑1 25 150 ‑ 50 300 ‑  
p‑Dichlorobenzene (1,4‑Dichlorobenzene) 106‑46‑7 10 60 ‑ ‑ ‑ ‑  
1,4‑Dichloro‑2‑butene 764‑41‑0 0.005 0.03 ‑ ‑ ‑ 1 A2
Dichlorodifluoromethane 75‑71‑8 1000 4950 ‑ ‑ ‑ ‑  
1,3‑Dichloro‑5,5‑dimethyl hydantoin 118‑52‑5 ‑ 0.2 ‑ ‑ 0.4 3  
Dichlorodiphenyl‑trichloroethane (DDT) 50‑29‑3 ‑ 1 ‑ ‑ ‑ ‑  
1,1‑Dichloroethane (Ethylidene chloride) 75‑34‑3 100 405 ‑ ‑ ‑ ‑  
1,2‑Dichloroethane (Ethylene dichloride) 107‑06‑2 10 40 ‑ ‑ ‑ ‑  
1,1‑Dichloroethylene (Vinylidene chloride) 75‑35‑4 5 20 ‑ ‑ ‑ ‑  
1,2‑Dichloroethylene, all isomers (Acetylene dichloride) 540‑59‑0 156‑59‑2 156‑60‑5 200 793 ‑ ‑ ‑ ‑  
Dichloroethyl ether (2,2’‑Dichlorodiethyl ether) 111‑44‑4 5 29 ‑ 10 58 1  
Dichlorofluoromethane (Dichloromonofluoromethane) 75‑43‑4 10 42 ‑ ‑ ‑ ‑  
Dichloromethane (Methylene chloride) 75‑09‑4 50 174 ‑ ‑ ‑ ‑  
1,1‑Dichloro‑1‑nitroethane 594‑72‑9 2 12 ‑ ‑ ‑ 3  
2,4‑Diclorophenoxyacetic acid (2,4‑D) 94‑75‑7 ‑ 10 ‑ ‑ ‑ 3  
1,2‑Dichloropropane (Propylene dichloride) 78‑87‑5 10 46 ‑ ‑ ‑ ‑  
1,1‑Dichloro‑1‑nitroethane 594‑72‑9 2 12 ‑ ‑ ‑ ‑  
1,3‑Dichloropropene 542‑75‑6 1 4.5 ‑ ‑ ‑ 1  
2,2‑Dichloropropionic acid 75‑99‑0 ‑ 5 ‑ ‑ ‑ 3  
Dichlorotetrafluoroethane
(1,2‑Dichloro‑1,1,2,
2‑tetrafluoroethane)		 76‑14‑2 1000 7000 ‑ ‑ ‑ ‑  
Dichlorvos 62‑73‑7 ‑ 0.1 ‑ ‑ ‑ 1  
Dicrotophos 141‑66‑2 ‑ 0.05 ‑ ‑ ‑ 1  
Dicyclopentadiene 77‑73‑6 5 27 ‑ ‑ ‑ 3  
Dicyclopentadienyl iron (Ferrocene) 102‑54‑5 ‑ 10 ‑ ‑ ‑ ‑  
Dieldrin 60‑57‑1 ‑ 0.25 ‑ ‑ ‑ 1  
Diesel fuel, as total hydrocarbons 68334‑30‑5
68476‑30‑2
68476‑34‑6
68476‑31‑3
77650‑28‑3		     100 ‑ ‑ ‑ ‑  
Diethanolamine 111‑42‑2 ‑ 2 ‑ ‑ ‑ 1  
Diethylamine 109‑89‑7 5 15 ‑ 15 45 1, 3  
2‑Diethylaminoethanol 100‑37‑8 2 9.6 ‑ ‑ ‑ 1  
Diethylene dioxide (1,4‑Dioxane) 123‑91‑1 20 72 ‑ ‑ ‑ 1  
Diethylene triamine 111‑40‑0 1 4.2 ‑ ‑ ‑ 1,3  
Diethyl ether (Ethyl ether) 60‑29‑7 400 1210 ‑ 500 1520 ‑  
Di(2‑ethylhexyl)phthalate
(DEHP, Di‑sec‑octyl phthalate)		 117‑81‑7 ‑ 5 ‑ ‑ ‑ 3  
Diethyl ketone 96‑22‑0 200 705 ‑ 300 1060 ‑  
Diethyl phthalate 84‑66‑2 ‑ 5 ‑ ‑ ‑ 3  
Difluorodibromomethane 75‑61‑6 100 858 ‑ ‑ ‑ ‑  
1,1‑Difluoroethylene (Vinylidene fluoride) 75‑38‑7 500 1310 ‑ ‑ ‑ ‑  
Diglycidyl ether 2238‑07‑5 0.1 0.5 ‑ ‑ ‑ ‑  
Dihydroxybenzene (Hydroquinone) 123‑31‑9 ‑ 2 ‑ ‑ ‑ ‑  
Diisobutyl ketone (2,6‑Dimethyl‑4‑heptanone) 108‑83‑8 25 145 ‑ ‑ ‑ 3  
Diisopropylamine 108‑18‑9 5 21 ‑ ‑ ‑ 1  
Dimethoxymethane(Methylal) 109‑87‑5 1000 3110 ‑ ‑ ‑ ‑  
N,N‑Dimethylacetamide 127‑19‑5 10 36 ‑ ‑ ‑ 1  
Dimethylamine 124‑40‑3 5 9.2 ‑ 15 28 ‑  
Dimethylaminobenzene (Xylidine, mixed isomers) 1300‑73‑8 0.5 2.5 ‑ ‑ ‑ 1  
bis(2‑Dimethylamino‑ethyl) ether (DMAEE) 3033‑62‑3 0.05 0.3 ‑ 0.15 0.98 1  
Dimethylaniline (N,N‑Dimethylaniline) 121‑69‑7 5 25 ‑ 10 50 1  
Dimethylbenzene
(Xylene, o, m & p isomers)		 1330‑20‑7
95‑47‑6
108‑38‑3
106‑42‑3		 100 434 ‑ 150 651 ‑  
Dimethylbutane
(Hexane, all isomers, except n‑Hexane)		 75‑83‑2
79‑29‑8		 500 1760 ‑ 1000 3500 ‑  
Dimethyl‑1,2‑dibromo‑2,2‑dichloroethyl
phosphate (Dibrom, Naled)		 300‑76‑5 ‑ 0.1 ‑ ‑ ‑ 1  
Dimethylethoxysilane 14857‑34‑2 0.5 2.1 ‑ 1.5 6.4 ‑  
Dimethylformamide 68‑12‑2 10 30 ‑ ‑ ‑ 1  
2,6‑Dimethyl‑4‑heptanone
(Diisobutyl ketone)		 108‑83‑8 25 145 ‑ ‑ ‑ 3  
1,1‑Dimethylhydrazine 57‑14‑7 0.01 0.02 ‑ ‑ ‑ 1  
Dimethyl phthalate 131‑11‑3 ‑ 5 ‑ ‑ ‑ 3  
1,1‑Dimethylpropyl acetate
(tert‑Amyl acetate)		 625‑16‑1 50 266 ‑ 100 532 3  
Dimethyl sulfate 77‑78‑1 0.1 0.5 ‑ ‑ ‑ 1, 3  
Dimethyl sulfide 75‑18‑3 10 25 ‑ ‑ ‑ 3  
Dinitolmide (3,5‑Dinitro‑o‑toluamide) 148‑01‑6 ‑ 5 ‑ ‑ ‑ ‑  
Dinitrobenzene, all isomers 528‑29‑0
99‑65‑0
100‑25‑4
25154‑54‑5		 0.15 1 ‑ ‑ ‑ 1  
Dinitro‑o‑cresol 534‑52‑1 ‑ 0.2 ‑ ‑ ‑ 1  
3,5‑Dinitro‑o‑toluamide (Dinitolmide) 148‑01‑6 ‑ 5 ‑ ‑ ‑ ‑  
Dinitrotoluene 25321‑14‑6 ‑ 0.2 ‑ ‑ ‑ 1  
1,4‑Dioxane (Diethylene dioxide) 123‑91‑1 20 72 ‑ ‑ ‑ 1  
Dioxathion 78‑34‑2 ‑ 0.1 ‑ ‑ ‑ 1  
1,3‑Dioxolane 646‑06‑0 20 61 ‑ ‑ ‑ ‑  
Diphenyl (Biphenyl) 92‑52‑4 0.2 1.3 ‑ ‑ ‑ ‑  
Diphenylamine 122‑39‑4 ‑ 10 ‑ ‑ ‑ ‑  
Diphenyl ether, vapour (Phenyl ether) 101‑84‑8 1 7 ‑ 2 14 ‑  
Diphenylmethane‑4,4’‑diisocyanate (Methylene bisphenyl isocyanate, MDI) 101‑68‑8 0.005 0.05 ‑ ‑ ‑ ‑  
Dipropylene glycol methyl ether [(2‑Methoxymethylethoxy) propanol, DPGME] 34590‑94‑8 100 606 ‑ 150 909 1  
Dipropyl ketone 123‑19‑3 50 235 ‑ ‑ ‑ 3  
Diquat Total Respirable 2764‑72‑9
85‑00‑7
6385‑62‑2		 ‑
‑		 ‑
0.5
0.1		 ‑
‑
‑		 ‑
‑
‑		 ‑
‑
‑		 ‑
1
1		  
Di‑sec‑octyl‑phthalate
(DEHP, Di‑sec‑octyl phthalate)		 117‑81‑7 ‑ 5 ‑ ‑ ‑ 3  
Disulfiram 97‑77‑8 ‑ 2 ‑ ‑ ‑ ‑  
Disulfoton 298‑04‑4 ‑ 0.05 ‑ ‑ ‑ 1  
Diuron 330‑54‑1 ‑ 10 ‑ ‑ ‑ 3  
Divinyl benzene 1321‑74‑0 10 53 ‑ ‑ ‑ 3  
Dodecyl mercaptan 112‑55‑0 0.1 0.8 ‑ ‑ ‑ 3  
Emery 1302‑74‑5 ‑ 10 ‑ ‑ ‑ 3  
Endosulfan 115‑29‑7 ‑ 0.1 ‑ ‑ ‑ 1  
Endrin 72‑20‑8 ‑ 0.1 ‑ ‑ ‑ 1  
Enflurane 13838‑16‑9 75 566 ‑ ‑ ‑ ‑  
Enzymes, proteolytic
(Subtilisins)		 1395‑21‑7
9014‑01‑1		 ‑ ‑ ‑ ‑ (c)0.00006 ‑  
Epichlorohydrin
(1‑Chloro‑2,3‑epoxypropane)		 106‑89‑8 0.5 1.9 ‑ ‑ ‑ 1  
EPN 2104‑64‑5 ‑ 0.1 ‑ ‑ ‑ 1  
1,2‑Epoxypropane (Propylene oxide) 75‑56‑9 2 4.7 ‑ ‑ ‑ ‑  
2,3‑Epoxy‑1‑propanol (Glycidol) 556‑52‑5 2 6.1 ‑ ‑ ‑ 3  
Ethane 74‑84‑0 1000 ‑ ‑ ‑ ‑ ‑  
Ethanethiol (Ethyl mercaptan) 75‑08‑1 0.5 1.3 ‑ ‑ ‑ ‑  
Ethanol (Ethyl alcohol) 64‑17‑5 1000 1880 ‑ ‑ ‑ ‑  
Ethanolamine (2‑Aminoethanol) 141‑43‑5 3 7.5 ‑ 6 15 3  
Ethion 563‑12‑2 ‑ 0.05 ‑ ‑ ‑ 1  
2‑Ethoxyethanol
(Ethylene glycol monoethyl ether)		 110‑80‑5 5 18 ‑ ‑ ‑ 1  
2‑Ethoxyethyl acetate (Ethylene glycol monoethyl ether acetate) 111‑15‑9 5 27 ‑ ‑ ‑ 1  
Ethyl acetate 141‑78‑6 400 1440 ‑ ‑ ‑ 3  
Ethyl acrylate (Acrylic acid, ethyl ester) 140‑88‑5 5 20 ‑ 15 61 ‑  
Ethyl alcohol (Ethanol) 64‑17‑5 1000 1880 ‑ ‑ ‑ ‑  
Ethylamine 75‑04‑7 5 9.2 ‑ 15 28 1  
Ethyl amyl ketone (5‑Methyl‑3‑heptanone) 541‑85‑5 25 131 ‑ ‑ ‑ ‑  
Ethyl benzene 100‑41‑4 100 434 ‑ 125 543 ‑  
Ethyl bromide (Bromoethane) 74‑96‑4 5 22 ‑ ‑ ‑ 1  
Ethyl tert‑butyl ether (ETBE) 637‑92‑3 5 21 ‑ ‑ ‑ ‑  
Ethyl butyl ketone (3‑Heptanone) 106‑35‑4 50 234 ‑ 75 350 ‑  
Ethyl chloride (Chloroethane) 795‑00‑3 100 264 ‑ ‑ ‑ 1  
Ethyl cyanoacrylate (Ethyl‑2‑cyanoacrylate) 7085‑85‑0 0.2 1 ‑ ‑ ‑ ‑  
Ethylene chlorohydrin (2‑chloroethanol) 107‑07‑3 ‑ ‑ ‑ (c) 1 (c) 3.3 1  
Ethylenediamine (1,2‑Diaminoethane) 107‑15‑3 10 25 ‑ ‑ ‑ 1  
Ethylene dichloride (1,2‑Dichloroethane) 107‑06‑2 10 40 ‑ ‑ ‑ ‑  
Ethylene 74‑85‑1 200 229 ‑ ‑ ‑ ‑  
Ethylene glycol 107‑21‑1 ‑ ‑ ‑ ‑ (c) 100 3  
Ethylene glycol dinitrate (EGDN) 628‑96‑6 0.05 0.3 ‑ ‑ ‑ 1  
Ethylene glycol isopropyl ether
(2‑Isopropoxyethanol)		 109‑59‑1 25 106 ‑ ‑ ‑ 1  
Ethylene glycol methyl ether acetate
(2‑Methoxyethyl acetate)		 110‑49‑6 0.1 0.5 ‑ ‑ ‑ 1  
Ethylene glycol monobutyl ether
(2‑Butoxyethanol)		 111‑76‑2 20 97 ‑ ‑ ‑ 3  
Ethylene glycol monoethyl ether
(2‑Ethoxyethanol)		 110‑80‑5 0.1 0.4 ‑ ‑ ‑ 1  
Ethylene glycol monoethyl ether acetate
(2‑Ethoxyethyl acetate)		 111‑15‑9 5 27 ‑ ‑ ‑ 1  
Ethylene glycol monomethyl ether
(2‑Methoxyethanol)		 109‑86‑4 0.1 0.3 ‑ ‑ ‑ 1  
Ethylene oxide 75‑21‑8 1 1.8 ‑ ‑ ‑ ‑ A2
Ethylenimine 151‑56‑4 0.5 0.9 ‑ ‑ ‑ 1  
Ethyl ether (Diethyl ether) 60‑29‑7 400 1210 ‑ 500 1520 ‑  
Ethyl formate (Formic acid, ethyl ester) 109‑94‑4 100 303 ‑ ‑ ‑ 3  
2‑Ethylhexanoic acid 149‑57‑5 ‑ 5 ‑ ‑ ‑ ‑  
Ethylidene chloride
(1,1‑Dichloroethane)		 75‑34‑3 100 405 ‑ ‑ ‑ ‑  
Ethylidene norbornene 16219‑75‑3 ‑ ‑ ‑ (c) 5 (c) 25 3  
Ethyl mercaptan 75‑08‑1 0.5 1.3 ‑ ‑ ‑ ‑  
N‑Ethylmorpholine 100‑74‑3 5 24 ‑ ‑ ‑ 1  
Ethyl silicate
(Silicic acid, tetraethyl ester)		 78‑10‑4 10 85 ‑ ‑ ‑ ‑  
Fenamiphos 22224‑92‑6 ‑ 0.05 ‑ ‑ ‑ 1  
Fensulfothion 115‑90‑2 ‑ 0.01 ‑ ‑ ‑ 1  
Fenthion 55‑38‑9 ‑ 0.05 ‑ ‑ ‑ 1  
Ferbam 14484‑64‑1 ‑ 10 ‑ ‑ ‑ 3  
Ferrocene (Dicyclopentadienyl iron) 102‑54‑5 ‑ 10 ‑ ‑ ‑ ‑  
Ferrovanadium dust 12604‑58‑9 ‑ 1 ‑ ‑ 3 3  
Flour dust (Total particulate)   ‑ 0.5 ‑ ‑ ‑ ‑  
Fluorides, as F   ‑ 2.5 ‑ ‑ ‑ ‑  
Fluorine 7782‑41‑4 1 1.6 ‑ 2 3.1 3  
Fluorotrichloromethane
(Trichlorofluoromethane)		 75‑69‑4 ‑ ‑ ‑ (c) 1000 (c) 5620 ‑  
Fonofos 944‑22‑9 ‑ 0.01 ‑ ‑ ‑ 1  
Formaldehyde 50‑00‑0 0.75 0.9 ‑ (c) 1 (c) 1.3 ‑ A2
Formamide 75‑12‑7 10 18 ‑ ‑ ‑ 1  
Formic acid 64‑18‑6 5 9.4 ‑ 10 19 3  
Formic acid, ethyl ester (Ethyl formate) 109‑94‑4 100 303 ‑ ‑ ‑ 3  
Formic acid, methyl ester
(Methyl formate)		 107‑31‑3 100 246 ‑ 150 368 3  
Furfural 98‑01‑1 2 7.9 ‑ ‑ ‑ 1, 3  
Furfuryl alcohol 98‑00‑0 10 40 ‑ 15 60 1, 3  
Gallium arsenide, respirable particulate 1303‑00‑0 ‑ 0.0003 ‑ ‑ ‑ 3  
Gasoline 86290‑81‑5 300 ‑ ‑ 500 ‑ ‑  
Germanium tetrahydride 7782‑65‑2 0.2 0.6 ‑ ‑ ‑ ‑  
Glass Fibres Continuous filament Continuous filament, total Glass Wool Special purpose  
‑
‑
‑
‑
  ‑
5
‑
‑
  1
‑
1
1
  ‑
‑
‑
‑
  ‑
‑
‑
‑
  3
3
‑
3		  
Glutaraldehyde, activated and
inactivated		 111‑30‑8 ‑ ‑ ‑ (c) 0.05 (c) 0.2 ‑  
Glycerin mist 56‑81‑5 ‑ 10 ‑ ‑ ‑ 3  
Glycidol (2,3‑Epoxy‑1‑propanol) 556‑52‑5 2 6.1 ‑ ‑ ‑ 3  
Glycol monoethyl ether
(2‑Ethoxyethanol)		 110‑80‑5 5 18 ‑ ‑ ‑ 1  
Glyoxal 107‑22‑2 ‑ 0.1 ‑ ‑ ‑ ‑  
Grain dust (oat, wheat, barley)   ‑ 4 ‑ ‑ ‑ ‑  
Graphite, respirable
(all forms except graphite fibres) 		7782‑42‑5 ‑ 2 ‑ ‑ ‑ ‑  
Guthion® (Azinphos‑methyl) 86‑50‑0 ‑ 0.2 ‑ ‑ ‑ 1  
Gypsum (Calcium sulphate) 13397‑24‑5 ‑ 10 ‑ ‑ ‑ ‑  
Hafnium and compounds, as Hf 7440‑58‑6 ‑ 0.5 ‑ ‑ ‑ ‑  
Halothane 151‑67‑7 50 404 ‑ ‑ ‑ ‑  
Helium 7440‑59‑7 ‑ ‑ ‑ ‑ ‑ 2  
Heptachlor and Heptachlor epoxide 76‑44‑8
1024‑57‑3		 ‑ 0.05 ‑ ‑ ‑ 1  
Heptane, all isomers 142‑82‑5
590‑35‑2
565‑59‑3
108‑08‑7
591‑76‑4
589‑34‑4		 400 1640 ‑ 500 2050 ‑  
2‑Heptanone (Methyl n‑amyl ketone) 110‑43‑0 50 233 ‑ ‑ ‑ 3  
3‑Heptanone (Ethyl butyl ketone) 106‑35‑4 50 234 ‑ 75 350 ‑  
Hexachlorobenzene 118‑74‑1 ‑ 0.002 ‑ ‑ ‑ 1  
Hexachlorobutadiene 87‑68‑3 0.02 0.2 ‑ ‑ ‑ 1  
γ‑Hexachlorocyclohexane (Lindane) 58‑89‑9 ‑ 0.5 ‑ ‑ ‑ 1  
Hexachlorocyclopentadiene 77‑47‑4 0.01 0.1 ‑ ‑ ‑ 3  
Hexachloroethane 67‑72‑1 1 9.7 ‑ ‑ ‑ 1  
Hexachloronaphthalene 1335‑87‑1 ‑ 0.2 ‑ ‑ ‑ 1  
Hexafluoroacetone 684‑16‑2 0.1 0.7 ‑ ‑ ‑ 1  
Hexahydrophthalic anhydride, all isomers 85‑42‑7
13149‑00‑3
14166‑21‑3
‑
‑
‑
‑
(c) 0.005
‑		  
1,6‑Hexamethylene diisocyanate 822‑06‑0 0.005 0.03 ‑ ‑ ‑ ‑  
n‑Hexane 110‑54‑3 50 176 ‑ ‑ ‑ 1  
Hexane (all isomers except n‑hexane) 107‑83‑5
96‑14‑0
75‑83‑2
79‑29‑8		 500 1760 ‑ 1000 3500 ‑  
1,6‑Hexanediamine 124‑09‑4 0.5 2.4 ‑ ‑ ‑ 3  
2‑Hexanone (Methyl n‑butyl ketone) 591‑78‑6 5 20 ‑ 10 40 1  
1‑Hexene 592‑41‑6 50 172 ‑ ‑ ‑ ‑  
Hexone (Methyl isobutyl ketone) 108‑10‑1 50 205 ‑ 75 307 ‑  
Sec‑Hexyl acetate 108‑84‑9 50 295 ‑ ‑ ‑ 3  
Hexylene glycol 107‑41‑5 ‑ ‑ ‑ (c) 25 (c) 121 3  
Hydrazine 302‑01‑2 0.01 0.01 ‑ ‑ ‑ 1  
HCFC‑123
1,1,1‑trifluoro‑2,2‑dichloroethane		 306‑83‑2 50 310 ‑ ‑ ‑ ‑  
Hydrogen 1333‑74‑0 ‑ ‑ ‑ ‑ ‑ 2  
Hydrogenated terphenyls 61788‑32‑7 0.5 4.9 ‑ ‑ ‑ ‑  
Hydrogen bromide 10035‑10‑6 ‑ ‑ ‑ (c) 2 (c) 6.6 3  
Hydrogen chloride 7647‑01‑0 ‑ ‑ ‑ (c) 2 (c) 3 3  
Hydrogen cyanide and cyanide salts,
as CN Hydrogen cyanide Calcium cyanide Potassium cyanide Sodium cyanide

74‑90‑8
592‑01‑8
151‑50‑8
143‑33‑9

‑
‑
‑
‑

‑
‑
‑
‑

‑
‑
‑
‑

(c) 4.7
‑
‑
‑

  (c) 5.2
(c) 5
(c) 5
(c) 5

  1
1
1
1		  
Hydrogen fluoride, as F 7664‑39‑3 0.5 0.4 ‑ (c) 2 (c) 1.6 ‑  
Hydrogen peroxide 7722‑84‑1 1 1.4 ‑ ‑ ‑ 3  
Hydrogen selenide, as Se 7783‑07‑5 0.05 0.2 ‑ ‑ ‑ ‑  
Hydrogen sulphide 7783‑06‑4 10 14 ‑ (c) 15 (c) 21 ‑  
Hydroquinone (Dihydroxybenzene) 123‑31‑9 ‑ 2 ‑ ‑ ‑ ‑  
4‑Hydroxy‑4‑methyl‑2‑pentanone (Diacetone alcohol) 123‑42‑2 50 238 ‑ ‑ ‑ 3  
2‑Hydroxypropyl acrylate 999‑61‑1 0.5 2.7 ‑ ‑ ‑ 1  
Indene 95‑13‑6 10 48 ‑ ‑ ‑ ‑  
Indium & compounds, as In 7440‑74‑6 ‑ 0.1 ‑ ‑ ‑ ‑  
Iodine 7553‑56‑2 ‑ ‑ ‑ (c) 0.1 (c) 1 3  
Iodoform 75‑47‑8 0.6 9.7 ‑ ‑ ‑ ‑  
Iron oxide (Fe203), Respirable 1309‑37‑1 ‑ 5 ‑ ‑ ‑ ‑  
Iron pentacarbonyl, as Fe 13463‑40‑6 0.1 0.8 ‑ 0.2 1.6 ‑  
Iron salts, soluble, as Fe ‑ ‑ 1 ‑ ‑ ‑ 3  
Isoamyl acetate (Isopentyl acetate) 123‑92‑2 50 266 ‑ 100 532 3  
Isoamyl alcohol 123‑51‑3 100 361 ‑ 125 451 3  
Isobutyl acetate 110‑19‑0 150 713 ‑ ‑ ‑ 3  
Isobutyl alcohol 78‑83‑1 50 152 ‑ ‑ ‑ 3  
Isobutyl nitrite 542‑56‑3 ‑ ‑ ‑ (c) 1 4.2 ‑  
Isooctyl alcohol 26952‑21‑6 50 266 ‑ ‑ ‑ 1, 3  
Isopentane (Pentane, all isomers) 78‑78‑4 600 1770 ‑ ‑ ‑ ‑  
Isopentyl acetate (Isoamyl acetate) 123‑92‑2 50 266 ‑ 100 532 3  
Isophorone 78‑59‑1 ‑ ‑ ‑ (c) 5 (c) 28 ‑  
Isophorone diisocyanate 4098‑71‑9 0.005 0.05 ‑ ‑ ‑ ‑  
Isopropanol (2‑Propanol,
Isopropyl alcohol)		 67‑63‑0 200 492 ‑ 400 984 ‑  
Isopropoxyethanol 109‑59‑1 25 106 ‑ ‑ ‑ 1  
Isopropyl acetate 108‑21‑4 100 416 ‑ 200 832 ‑  
Isopropyl alcohol (2‑Propanol,
Isopropanol)		 67‑63‑0 200 492 ‑ 400 984 ‑  
Isopropylamine 75‑31‑0 5 12 ‑ 10 24 ‑  
N‑Isopropylaniline 768‑52‑5 2 11 ‑ ‑ ‑ 1  
Isopropyl ether 108‑20‑3 250 1040 ‑ 310 1300 3  
Isopropyl glycidyl ether (IGE) 4016‑14‑2 50 238 ‑ 75 356 ‑  
Kaolin respirable 1332‑58‑7
‑
  2
  ‑
  ‑
  ‑
  ‑		  
Kerosene/Jet fuels, as total hy
drocarbon vapour		 8008‑20‑6
64742‑81‑0		 ‑ 200 ‑ ‑ ‑ 1  
Ketene 463‑51‑4 0.5 0.9 ‑ 1.5 2.6 ‑  
Lead elemental & inorganic
compounds, as Pb		 7439‑92‑1 ‑ 0.05 ‑ ‑ ‑ ‑  
Lead arsenate, as Pb(As04)2 7784‑40‑9 ‑ 0.15 ‑ ‑ ‑ ‑  
Lead chromate, as Pb as Cr 7758‑97‑6 ‑ 0.05
0.012		 ‑ ‑ ‑ ‑ A2
Limestone (Calcium carbonate) 1317‑65‑3 ‑ 10 ‑ ‑ ‑ 3  
Lindane (γ‑Hexachlorocyclohexane) 58‑89‑9 ‑ 0.5 ‑ ‑ ‑ 1  
Lithium hydride 7580‑67‑8 ‑ 0.025 ‑ ‑ ‑ 3  
L.P.G. (Liquified petroleum gas) 68476‑85‑7 1000 ‑ ‑ 1500 ‑ ‑  
Magnesium oxide fume 1309‑48‑4 ‑ 10 ‑ ‑ ‑ ‑  
Malathion 121‑75‑5 ‑ 1 ‑ ‑ ‑ 1  
Maleic anhydride 108‑31‑6 0.1 0.4 ‑ ‑ ‑ ‑  
Manganese, elemental & inorganic
compounds, as Mn		 7439‑96‑5 ‑ 0.2 ‑ ‑ ‑ ‑  
Manganese cyclopentadienyl
tricarbonyl, as Mn		 12079‑65‑1 ‑ 0.1 ‑ ‑ ‑ 1  
Marble (Calcium carbonate) 1317‑65‑3 ‑ 10 ‑ ‑ ‑ 3  
Mercury, as Hg in
Alkyl compounds, Aryl compounds Inorganic compounds, including metallic mercury 		7439‑97‑6  
0.01
0.1
0.025
‑
‑
‑
‑
‑
‑
0.03
‑
‑
1
1
1		  
Mesityl oxide 141‑79‑7 15 60 ‑ 25 100 ‑  
Methacrylic acid 79‑41‑4 20 70 ‑ ‑ ‑ 3  
Methacrylic acid, methyl ester
(Methyl methacrylate)		 80‑62‑6 50 205 ‑ 100 410 ‑  
Methanethiol (Methyl mercaptan) 74‑93‑1 0.5 1.0 ‑ ‑ ‑ ‑  
Methanol (Methyl alcohol) 67‑56‑1 200 262 ‑ 250 328 1  
Methomyl 16752‑77‑5 ‑ 2.5 ‑ ‑ ‑ ‑  
Methoxychlor 72‑43‑5 ‑ 10 ‑ ‑ ‑ ‑  
2‑Methoxyethanol
(Ethylene glycol monomethyl ether)		 109‑86‑4 0.1 0.3 ‑ ‑ ‑ 1  
2‑Methoxyethyl acetate (Ethylene glycol
monomethyl ether acetate)		 110‑49‑6 0.1 0.5 ‑ ‑ ‑ 1  
(2‑Methoxymethylethoxy) propanol
(DPGME)		 34590‑94‑8 100 606 ‑ 150 909 ‑  
4‑Methoxyphenol 150‑76‑5 ‑ 5 ‑ ‑ ‑ ‑  
1‑Methoxy‑2‑propanol
(Propylene glycol monomethyl ether)		 107‑98‑2 100 369 ‑ 150 553 ‑  
Methyl acetate 79‑20‑9 200 606 ‑ 250 757 ‑  
Methyl acetylene (Propyne) 74‑99‑7 1000 1640 ‑ ‑ ‑ ‑  
Methyl acetylene‑propadiene mixture
(MAPP)		 59355‑75‑8 1000 1640 ‑ 1250 2050 ‑  
Methyl acrylate (Acrylic acid,
methyl ester)		 96‑33‑3 2 7 ‑ ‑ ‑ 1  
Methylacrylonitrile 126‑98‑7 1 2.7 ‑ ‑ ‑ 1  
Methylal (Dimethoxymethane) 109‑87‑5 1000 3110 ‑ ‑ ‑ ‑  
Methyl alcohol (Methanol) 67‑56‑1 200 262 ‑ 250 328 1  
Methylamine 74‑89‑5 5 6.4 ‑ 15 19 3  
Methyl amyl alcohol (Methyl isobutyl
carbinol; 4‑Methyl‑2‑pentanol)		 108‑11‑2 25 104 ‑ 40 167 1  
Methyl n‑amyl ketone (2‑Heptanone) 110‑43‑0 50 233 ‑ ‑ ‑ 3  
N‑Methyl aniline (Monomethyl aniline) 100‑61‑8 0.5 2.2 ‑ ‑ ‑ 1  
2‑Methylaziridine (Propyleneimine) 75‑55‑8 2 4.7 ‑ ‑ ‑ 1,3  
Methyl bromide 74‑83‑9 1 3.9 ‑ ‑ ‑ 1,3  
1‑Methylbutyl acetate
(2‑Pentyl acetate, sec‑amyl acetate)		 626‑38‑0 50 266 ‑ 100 532 3  
3‑Methylbutyl acetate
(Isopentyl acetate, isoamyl acetate)		 123‑92‑2 50 266 ‑ 100 532 3  
Methyl‑tert‑butyl ether (MTBE) 1634‑04‑4 50 180 ‑ ‑ ‑ ‑  
Methyl n‑butyl ketone (2‑Hexanone) 591‑78‑6 5 20 ‑ 10 40 1  
Methyl Cellosolve (2‑Methoxyethanol) 109‑86‑4 0.1 0.3 ‑ ‑ ‑ 1  
Methyl Cellosolve acetate
(2‑Methoxyethyl acetate)		 110‑49‑6 0.1 0.5 ‑ ‑ ‑ 1  
Methyl chloride 74‑87‑3 50 103 ‑ 100 207 1  
Methyl chloroform
(1,1,1‑Trichloroethane)		 71‑55‑6 350 1910 ‑ 450 2460 ‑  
Methyl‑2‑cyanoacrylate 137‑05‑3 0.2 0.9 ‑ ‑ ‑ 3  
Methylcyclohexane 108‑87‑2 400 1610 ‑ ‑ ‑ ‑  
Methylcyclohexanol 25639‑42‑3 50 234 ‑ ‑ ‑ 3  
o‑Methylcyclohexanone 583‑60‑8 50 229 ‑ 75 344 1  
2‑Methylcyclopentadienyl manganese
tricarbonyl, as Mn		 12108‑13‑3 ‑ 0.2 ‑ ‑ ‑ 1  
Methyl demeton (Demeton‑methyl) 8022‑00‑2 ‑ 0.5 ‑ ‑ ‑ 1  
Methylene bisphenyl isocyanate
(Diphenylmethane‑4,4’‑diisocyanate; MDI)		 101‑68‑8 0.005 0.05 ‑ ‑ ‑ ‑  
Methylene chloride (Dichloromethane) 75‑09‑2 50 174 ‑ ‑ ‑ ‑  
4,4’‑Methylenebis(2‑chloroaniline)
(MBOCA)		 101‑14‑4 0.01 0.1 ‑ ‑ ‑ 1  
Methylenebis(4‑cyclohexylisocyanate) 5124‑30‑1 0.005 0.05 ‑ ‑ ‑ ‑  
4,4’‑Methylene dianiline
(4,4’‑Diaminodiphenylmethane)		 101‑77‑9 0.1 0.8 ‑ ‑ ‑ 1  
Methyl ethyl ketone
(MEK; 2‑Butanone)		 78‑93‑3 200 590 ‑ 300 885 ‑  
Methyl ethyl ketone peroxide 1338‑23‑4 ‑ ‑ ‑ (c) 0.2 (c) 1.4 ‑  
Methyl formate
(Formic acid, methyl ester)		 107‑31‑3 100 246 ‑ 150 368 3  
5‑Methyl‑3‑heptanone
(Ethyl amyl ketone)		 541‑85‑5 25 131 ‑ ‑ ‑ ‑  
Methyl hydrazine 60‑34‑4 0.01 0.02 ‑ ‑ ‑ 1  
Methyl iodide 74‑88‑4 2 12 ‑ ‑ ‑ 1  
Methyl isoamyl ketone 110‑12‑3 50 234 ‑ ‑ ‑ ‑  
Methyl isobutyl carbinol
(Methyl amyl alcohol)		 108‑11‑2 25 104 ‑ 40 167 1  
Methyl isobutyl ketone (Hexone) 108‑10‑1 50 205 ‑ 75 307 ‑  
Methyl isocyanate 624‑83‑9 0.02 0.05 ‑ ‑ ‑ 1,3  
Methyl isopropyl ketone 563‑80‑4 200 705 ‑ ‑ ‑ 3  
Methyl mercaptan (Methanethiol) 74‑93‑1 0.5 1 ‑ ‑ ‑ ‑  
Methyl mercury, as Hg
(mercury, alkyl compounds)		 22967‑92‑6 ‑ 0.01 ‑ ‑ 0.03 1  
Methyl methacrylate 80‑62‑6 50 205 ‑ 100 410 ‑  
Methyl parathion 298‑00‑0 ‑ 0.2 ‑ ‑ ‑ 1  
2‑Methylpentane (all isomers except
n‑hexane, isohexane) (hexane)		 107‑83‑5 500 1760 ‑ 1000 3500 ‑  
3‑Methylpentane (all isomers except
n‑hexane) (hexane)		 96‑14‑0 500 1760 ‑ 1000 3500 ‑  
4‑Methyl‑2‑pentanol
(Methyl amyl alcohol)		 108‑11‑2 25 104 ‑ 40 167 1  
Methyl propyl ketone (2‑Pentanone) 107‑87‑9 200 705 ‑ 250 881 ‑  
Methyl silicate 681‑84‑5 1 6 ‑ ‑ ‑ ‑  
α‑Methyl styrene 98‑83‑9 50 242 ‑ 100 483 ‑  
Methyl styrene (all isomers)
(Vinyl toluene, α‑methyl styrene)		 25013‑15‑4
98‑83‑9
1319‑73‑9		 50 242 ‑ 100 483 ‑  
N‑Methyl‑N,2,4,6‑tetranitroaniline
(Tetryl)		 479‑45‑8 ‑ 1.5 ‑ ‑ ‑ 3  
Methyl vinyl ketone (3‑Buten‑2‑one) 78‑94‑4 ‑ ‑ ‑ (c) 0.2 (c) 0.6 1  
Metribuzin 21087‑64‑9 ‑ 5 ‑ ‑ ‑ ‑  
Mevinphos 7786‑34‑7 ‑ 0.01 ‑ ‑ ‑ 1  
Mica Respirable 12001‑26‑2
‑
3
‑
‑
‑
‑		  
Molybdenum, as Mo Soluble compounds, respirable Metal and insoluble compounds, respirable Metal and insoluble compounds, total 7439‑98‑7
‑
‑
‑
0.5
3
10
‑
‑
‑
‑
‑
‑
‑
‑
‑
3
‑
‑		  
Monochloroacetic acid 79‑11‑8 0.5 1.9 ‑ ‑ ‑ 1,3  
Monochlorobenzene (Chlorobenzene) 108‑90‑7 10 46 ‑ ‑ ‑ ‑  
Monocrotophos 6923‑22‑4 ‑ 0.05 ‑ ‑ ‑ 1  
Morpholine 110‑91‑8 20 71 ‑ ‑ ‑ 1  
Naled (Dibrom) 300‑76‑5 ‑ 0.1 ‑ ‑ ‑ 1  
Naphtha (Rubber solvent) 8030‑30‑6 400 1590 ‑ ‑ ‑ ‑  
Naphthalene 91‑20‑3 10 52 ‑ 15 79 1  
α‑Naphthylthiourea (ANTU) 86‑88‑4 ‑ 0.3 ‑ ‑ ‑ ‑  
Natural Rubber latex, as total proteins 9006‑04‑6 ‑ 0.001 ‑ ‑ ‑ 1  
Neon 7440‑01‑9 ‑ ‑ ‑ ‑ ‑ 2  
Nickel
Elemental/metal Insoluble compounds, as Ni Soluble compounds, as Ni
7440‑02‑0
‑
‑
‑
1.5
0.2
0.1
‑
‑
‑
‑
‑
‑
‑
‑
‑
‑
‑
‑

A1
Nickel carbonyl, as Ni 13463‑39‑3 0.05 0.3 ‑ ‑ ‑ ‑  
Nickel subsulfide, as Ni 12035‑72‑2 ‑ 0.1 ‑ ‑ ‑ ‑ A1
Nicotine 54‑11‑5 ‑ 0.5 ‑ ‑ ‑ 1  
Nitrapyrin
(2‑Chloro‑6‑trichloromethyl pyridine)		 1929‑82‑4 ‑ 10 ‑ ‑ 20 ‑  
Nitric acid 7697‑37‑2 2 5.2 ‑ 4 10 ‑  
Nitric oxide 10102‑43‑9 25 31 ‑ ‑ ‑ ‑  
p‑Nitroaniline 100‑01‑6 ‑ 3 ‑ ‑ ‑ 1  
Nitrobenzene 98‑95‑3 1 5 ‑ ‑ ‑ 1  
p‑Nitrochlorobenzene 100‑00‑5 0.1 0.6 ‑ ‑ ‑ 1  
Nitroethane 79‑24‑3 100 307 ‑ ‑ ‑ ‑  
Nitrogen 7727‑37‑9 ‑ ‑ ‑ ‑ ‑ 2  
Nitrogen dioxide 10102‑44‑0 3 5.6 ‑ 5 9.4 3  
Nitrogen trifluoride 7783‑54‑2 10 29 ‑ ‑ ‑ ‑  
Nitroglycerin (NG) 55‑63‑0 0.05 0.5 ‑ ‑ ‑ 1  
Nitromethane 75‑52‑5 20 50 ‑ ‑ ‑ ‑  
1‑Nitropropane 108‑03‑2 25 91 ‑ ‑ ‑ ‑  
2‑Nitropropane 79‑46‑9 10 36 ‑ ‑ ‑ ‑  
Nitrotoluene, all isomers 88‑72‑2
99‑08‑1
99‑99‑0		 2   11   ‑ ‑   ‑   1    
Nitrotrichloromethane
(Chloropicrin, trichloronitromethane)		 76‑06‑2 0.1 0.7 ‑ ‑ ‑ ‑  
Nitrous oxide 10024‑97‑2 50 90 ‑ ‑ ‑ ‑  
Nonane, all isomers 111‑84‑2 200 1050 ‑ ‑ ‑ ‑  
Octachloronaphthalene 2234‑13‑1 ‑ 0.1 ‑ ‑ 0.3 1  
Octane, all isomers 111‑65‑9 300 1400 ‑ ‑ ‑ 3  
Oil mist, mineral   ‑ 5 ‑ ‑ 10 ‑  
Osmium tetroxide, as Os 20816‑12‑0 0.0002 0.002 ‑ 0.0006 0.006 3  
Oxalic acid 144‑62‑7 ‑ 1 ‑ ‑ 2 3  
Oxygen difluoride 7783‑41‑7 ‑ ‑ ‑ (c) 0.05 (c) 0.1 ‑  
Ozone 10028‑15‑6 0.1 0.2 ‑ 0.3 0.6 ‑  
Paraffin wax fume 8002‑74‑2 ‑ 2 ‑ ‑ ‑ ‑  
Paraquat Total Respirable 4685‑14‑7
‑
‑
0.5
0.1
‑
‑
‑
‑
‑
‑
‑
‑		  
Parathion 56‑38‑2 ‑ 0.05 ‑ ‑ ‑ 1  
Particulate polycyclic aromatic hydrocarbons
(PPAH; Coal tar pitch volatiles)		 65996‑93‑2 ‑ 0.2 ‑ ‑ ‑ ‑ A1
Particulate Not Otherwise Regulated Total Respirable  
‑
‑
10
3
‑
‑
‑
‑
‑
‑		 3  
PCBs, Polychlorinated biphenyls
42 percent chlorine
(Chlorodiphenyl – 42 percent chlorine)
53469‑21‑9
‑
1
‑
‑
‑
1		  
PCBs, Polychlorinated biphenyls 54 percent chlorine
(Chlorodiphenyl – 54 percent chlorine)
11097‑69‑1
‑
0.5
‑
‑
‑
1		  
Pentaborane 19624‑22‑7 0.005 0.01 ‑ 0.015 0.04 ‑  
Pentachloronaphthalene 1321‑64‑8 ‑ 0.5 ‑ ‑ ‑ 1  
Pentachloronitrobenzene 82‑68‑8 ‑ 0.5 ‑ ‑ ‑ ‑  
Pentachlorophenol 87‑86‑5 ‑ 0.5 ‑ ‑ ‑ 1  
Pentaerythritol 115‑77‑5 ‑ 10 ‑ ‑ ‑ 3  
Pentane, all isomers 78‑78‑4
109‑66‑0
463‑82‑1		 600 1770 ‑ ‑ ‑ ‑  
2‑Pentanone (Methyl propyl ketone) 107‑87‑9 200 705 ‑ 250 881 ‑  
1‑Pentyl acetate (n‑Amyl acetate) 628‑63‑7 50 266 ‑ 100 532 3  
2‑Pentyl acetate (sec‑Amyl acetate) 626‑38‑0 50 266 ‑ 100 532 3  
Perchloroethylene (Tetrachloroethylene) 127‑18‑4 25 170 ‑ 100 678 ‑  
Perchloromethyl mercaptan 594‑42‑3 0.1 0.8 ‑ ‑ ‑ 3  
Perchloryl fluoride 7616‑94‑6 3 13 ‑ 6 25 ‑  
Perfluorobutyl ethylene 19430‑93‑4 100 1010 ‑ ‑ ‑ ‑  
Perfluoroisobutylene 382‑21‑8 ‑ ‑ ‑ (c) 0.01 (c) 0.08 ‑  
Persulphates Ammonium persulphate Potassium persulphate Sodium persulphate
7727‑54‑0
7727‑21‑1
7775‑27‑1
‑
‑
‑
0.1
0.1
0.1
‑
‑
‑
‑
‑
‑
‑
‑
‑
3
3
3		  
Phenacyl chloride
(2‑Chloroacetophenone)		 532‑27‑4 0.05 0.3 ‑ ‑ ‑ 3  
Phenol 108‑95‑2 5 19 ‑ ‑ ‑ 1  
Phenothiazine 92‑84‑2 ‑ 5 ‑ ‑ ‑ 1  
o‑Phenylenediamine 95‑54‑5 ‑ 0.1 ‑ ‑ ‑ ‑  
m‑Phenylenediamine 108‑45‑2 ‑ 0.1 ‑ ‑ ‑ ‑  
p‑Phenylenediamine 106‑50‑3 ‑ 0.1 ‑ ‑ ‑ ‑  
Phenyl ether, vapour 101‑84‑8 1 7 ‑ 2 14 ‑  
Phenylethylene (Styrene, monomer) 100‑42‑5 20 85 ‑ 40 170 ‑  
Phenyl glycidyl ether (PGE) 122‑60‑1 0.1 0.6 ‑ ‑ ‑ 1  
Phenylhydrazine 100‑63‑0 0.1 0.4 ‑ ‑ ‑ 1  
Phenyl mercaptan 108‑98‑5 0.1 0.5 ‑ ‑ ‑ 1  
Phenylphosphine 638‑21‑1 ‑ ‑ ‑ (c) 0.05 (c) 0.2 ‑  
Phorate 298‑02‑2 ‑ 0.05 ‑ ‑ ‑ 1  
Phosgene (Carbonyl chloride) 75‑44‑5 0.1 0.4 ‑ ‑ ‑ ‑  
Phosphine 7803‑51‑2 0.3 0.4 ‑ 1 1.4 ‑  
Phosphoric acid 7664‑38‑2 ‑ 1 ‑ ‑ 3 3  
Phosphorous (yellow) 7723‑14‑0 ‑ 0.1 ‑ ‑ ‑ ‑  
Phosphorus oxychloride 10025‑87‑3 0.1 0.6 ‑ ‑ ‑ 3  
Phosphorus pentachloride 10026‑13‑8 0.1 0.9 ‑ ‑ ‑ 3  
Phosphorus pentasulphide 1314‑80‑3 ‑ 1 ‑ ‑ 3 3  
Phosphorus trichloride 7719‑12‑2 0.2 1.1 ‑ 0.5 2.8 3  
Phthalic anhydride 85‑44‑9 1 6.1 ‑ ‑ ‑ ‑  
m‑Phthalodinitrile 626‑17‑5 ‑ 5 ‑ ‑ ‑ 3  
Picloram 1918‑02‑1 ‑ 10 ‑ ‑ ‑ ‑  
Picric acid (2,4,6‑Trinitrophenol) 88‑89‑1 ‑ 0.1 ‑ ‑ ‑ ‑  
Pindone (2‑Pivalyl‑1,3‑indandione) 83‑26‑1 ‑ 0.1 ‑ ‑ ‑ ‑  
Piperazine dihydrochloride 142‑64‑3 ‑ 5 ‑ ‑ ‑ ‑  
2‑Pivalyl‑1,3‑indandione (Pindone) 83‑26‑1 ‑ 0.1 ‑ ‑ ‑ ‑  
Plaster of Paris
(Calcium sulfate; Gypsum)		 26499‑65‑0 ‑ 10 ‑ ‑ ‑ ‑  
Platinum Metal Soluble salts, as Pt 7440‑06‑4
‑
‑
1
0.002
‑
‑
‑
‑
‑
‑
‑
‑		  
Polymethylene polyphenyl isocyanate
(PAPI)		 9016‑87‑9 0.005 0.07 ‑ ‑ ‑ ‑  
Portland cement 65997‑15‑1 ‑ 10 ‑ ‑ ‑ ‑  
Potassium hydroxide 1310‑58‑3 ‑ ‑ ‑ ‑ (c) 2 3  
Potassium persulfate (Persulfates) 7727‑21‑1 ‑ 0.1 ‑ ‑ ‑ 3  
Propane 74‑98‑6 1000 ‑ ‑ ‑ ‑ ‑  
n‑Propanol (n‑Propyl alcohol) 71‑23‑8 200 492 ‑ 400 984 3  
2‑Propanol
(Isopropyl alcohol, isopropanol)		 67‑63‑0 200 492 ‑ 400 984 ‑  
Propargyl alcohol 107‑19‑7 1 2.3 ‑ ‑ ‑ 1  
β‑Propiolactone 57‑57‑8 0.5 1.5 ‑ ‑ ‑ ‑  
Propionaldehyde 123‑38‑6 20 48 ‑ ‑ ‑ 3  
Propionic acid 79‑09‑4 10 30 ‑ ‑ ‑ 3  
Propoxur 114‑26‑1 ‑ 0.5 ‑ ‑ ‑ ‑  
n‑Propyl acetate 109‑60‑4 200 835 ‑ 250 1040 3  
n‑Propyl alcohol (n‑Propanol) 71‑23‑8 200 492 ‑ 400 984 3  
Propylene 115‑07‑1 500 860 ‑ ‑ ‑ ‑  
Propylene dichloride
(1,2‑Dichloropropane)		 78‑87‑5 10 46 ‑ ‑ ‑ ‑  
Propylene glycol dinitrate 6423‑43‑4 0.05 0.3 ‑ ‑ ‑ 1  
Propylene glycol monomethyl ether 107‑98‑2 100 369 ‑ 150 553 ‑  
Propyleneimine (2‑Methylaziridine) 75‑55‑8 2 4.7 ‑ ‑ ‑ 1,3  
Propylene oxide (1,2‑Epoxypropane) 75‑56‑9 2 4.7 ‑ ‑ ‑ ‑  
n‑Propyl nitrate 627‑13‑4 25 107 ‑ 40 172 ‑  
Propyne (Methyl acetylene) 74‑99‑7 1000 1640 ‑ ‑ ‑ ‑  
Pyrethrum 8003‑34‑7 ‑ 5 ‑ ‑ ‑ ‑  
Pyridine 110‑86‑1 1 3.2 ‑ ‑ ‑ ‑  
Pyrocatechol (Catechol) 120‑80‑9 5 23 ‑ ‑ ‑ 1  
Quartz, Respirable particulate 14808‑60‑7 ‑ 0.025 ‑ ‑ ‑ ‑ A2
Quinone 106‑51‑4 0.1 0.4 ‑ ‑ ‑ ‑  
RCF (Refractory Ceramic Fibres) ‑ ‑ ‑ 0.2 ‑ ‑ ‑ A2
RDX (Cyclonite) 121‑82‑4 ‑ 0.5   ‑ ‑ 1  
Refractory Ceramic Fibres (RCF) ‑ ‑ ‑ 0.2 ‑ ‑ ‑ A2
Resorcinol 108‑46‑3 10 45 ‑ 20 90 3  
Rhodium, as Rh Metal and Insoluble compounds, Soluble compounds 7440‑16‑6
‑
‑
1
0.01
‑
‑
‑
‑
‑
‑
3
‑		  
Rock Wool Fibres   ‑ ‑ 1 ‑ ‑ ‑  
Ronnel 299‑84‑3 ‑ 5 ‑ ‑ ‑ ‑  
Rotenone (commercial) 83‑79‑4 ‑ 5 ‑ ‑ ‑ ‑  
Rubber solvent (Naphtha) 8030‑30‑6 400 1590 ‑ ‑ ‑ ‑  
Selenium and compounds, as Se 7782‑49‑2 ‑ 0.2 ‑ ‑ ‑ 3  
Selenium hexafluoride 7783‑79‑1 0.05 0.4 ‑ ‑ ‑ ‑  
Sesone(Sodium‑2‑4‑
dichlorophenoxyethyl sulphate)		 136‑78‑7 ‑ 10 ‑ ‑ ‑ 3  
Silane (Silicon tetrahydride) 7803‑62‑5 5 6.6 ‑ ‑ ‑ 3  
Silica‑Crystalline,
Respirable particulate Cristobalite Quartz

14464‑46‑1
14808‑60‑7

‑
‑

0.025
0.025

‑
‑

‑
‑

‑
‑

‑
‑

A2
A2
Silicic acid, tetraethyl ester
(Ethyl silicate)		 78‑10‑4 10 85 ‑ ‑ ‑ ‑  
Silicon carbide, nonfibrous
Total particulate
Respirable particulate
 409‑21‑2
‑
‑
10
3
‑
‑
‑
‑
‑
‑
3
3		  
Silicon carbide, fibrous (including
whiskers) 		409‑21‑2 ‑ ‑ 0.1 ‑ ‑ ‑ A2
Silicon tetrahydride (Silane) 7803‑62‑5 5 6.6 ‑ ‑ ‑ 3  
Silver Metal Soluble compounds, as Ag 7440‑22‑4
‑
‑
0.1
0.01
‑
‑
‑
‑
‑
‑
‑
‑		  
Slag Wool Fibres   ‑ ‑ 1 ‑ ‑ ‑  
Soapstone Total (no asbestos and less than 1% crystalline silica) Respirable  
‑

‑
6

3
‑

‑
‑

‑
‑

‑
3

3		  
Sodium azide As Sodium azide As Hydrazoic acid vapour 26628‑22‑8
‑
‑
‑
‑
‑
‑
‑
(c) 0.11
(c) 0.29
0.3
‑
‑		  
Sodium bisulfite 7631‑90‑5 ‑ 5 ‑ ‑ ‑ 3  
Sodium‑2,4‑dichlorophenoxyethyl
sulfate (Sesone)		 136‑78‑7 ‑ 10 ‑ ‑ ‑ 3  
Sodium fluoroacetate 62‑74‑8 ‑ 0.05 ‑ ‑ ‑ 1  
Sodium hydroxide 1310‑73‑2 ‑ ‑ ‑ ‑ (c) 2 3  
Sodium metabisulfite 7681‑57‑4 ‑ 5 ‑ ‑ ‑ 3  
Sodium persulfate (Persulfates) 7775‑27‑1 ‑ 0.1 ‑ ‑ ‑ 3  
Starch 9005‑25‑8 ‑ 10 ‑ ‑ ‑ ‑  
Stearates, excludes stearates of
toxic metals		   ‑ 10 ‑ ‑ ‑ 3  
Stibine (Antimony hydride) 7803‑52‑3 0.1 0.5   ‑ ‑ ‑  
Stoddard solvent 8052‑41‑3 100 572 ‑ ‑ ‑ ‑  
Strontium chromate, as Cr 7789‑06‑2 ‑ 0.0005 ‑ ‑ ‑ ‑ A2
Strychnine 57‑24‑9 ‑ 0.15 ‑ ‑ ‑ ‑  
Styrene, monomer
(Phenylethylene; Vinyl benzene)		 100‑42‑5 20 85 ‑ 40 170 ‑  
Subtilisins (as 100 percent pure
crystalline enzyme) 		1395‑21‑7
9014‑01‑1		 ‑ ‑ ‑ ‑ (c) 0.00006 ‑  
Sucrose 57‑50‑1 ‑ 10 ‑ ‑ ‑ ‑  
Sulfometuron methyl 74222‑97‑2 ‑ 5 ‑ ‑ ‑ ‑  
Sulfotep (TEDP) 3689‑24‑5 ‑ 0.1 ‑ ‑ ‑ 1  
Sulphur 7704‑34‑9
63705‑05‑5		 ‑ 10 ‑ ‑ ‑ ‑  
Sulphur dioxide 7446‑09‑5 2 5.2 ‑ 5 13 3  
Sulphur hexafluoride 2551‑62‑4 1000 5970 ‑ ‑ ‑ ‑  
Sulphuric acid 7664‑93‑9 ‑ 1 ‑ ‑ 3 ‑ A2
Sulphur monochloride 10025‑67‑9 ‑ ‑ ‑ (c) 1 (c) 5.5 ‑  
Sulphur pentafluoride 5714‑22‑7 ‑ ‑ ‑ (c) 0.01 (c) 0.1 3  
Sulphur tetrafluoride 7783‑60‑0 ‑ ‑ ‑ (c) 0.1 (c) 0.4 ‑  
Sulphuryl fluoride 2699‑79‑8 5 21 ‑ 10 42 ‑  
Sulprofos 35400‑43‑2 ‑ 1 ‑ ‑ ‑ ‑  
Synthetic Vitreous Fibres: Glass fibres, continuous filament Glass fibres, continuous filament, total particulate Glass fibres, special purpose Glass wool fibres Refractory ceramic fibres (RCF) Rock wool fibres Slag wool fibres  
‑
‑

‑
‑
‑
‑
‑
‑
5

‑
‑
‑
‑
‑
1
‑

1
1
0.2
1
1
‑
‑

‑
‑
‑
‑
‑
‑
‑

‑
‑
‑
‑
‑‑
3
3

‑
‑
‑
‑
‑
‑
‑

‑
‑
A2
‑
‑
Systox ® (Demeton) 8065‑48‑3 ‑ 0.05 ‑ ‑ ‑ 1  
2,4,5‑T
(2,4,5‑Trichlorophenoxyacetic acid)		 93‑76‑5 ‑ 10 ‑ ‑ ‑ ‑  
Talc
Respirable particulate containing no asbestos fibres 		14807‑96‑6
‑  
2  
‑  
‑  
‑  
‑  		      
Tantalum metal and oxide dusts, as Tas 7440‑25‑7
1314‑61‑0		 ‑ 5 ‑ ‑ ‑ 3  
TEDP
(Sulfotep)		 3689‑24‑5 ‑ 0.1   ‑ ‑ 1  
Tellurium & compounds, except
hydrogen telluride, as Te		 13494‑80‑9 ‑ 0.1   ‑ ‑ ‑ ‑  
Tellurium hexafluoride 7783‑80‑4 0.02 0.2 ‑ ‑ ‑ 3  
Temephos 3383‑96‑8 ‑ 1 ‑ ‑ ‑ 1  
TEPP (Tetraethyl pyrophosphate) 107‑49‑3 ‑ 0.05 ‑ ‑ ‑ 1  
Terbufos 13071‑79‑9 ‑ 0.01 ‑ ‑ ‑ 1  
Terephthalic acid 100‑21‑0 ‑ 10 ‑ ‑ ‑ ‑  
Terphenyls 26140‑60‑3 ‑ ‑ ‑ ‑ (c) 5 3  
1,1,2,2‑Tetrabromoethane
(Acetylene tetrabromide)		 79‑27‑6 0.1 1.4 ‑ ‑ ‑ ‑  
1,1,1,2‑Tetrachloro‑2,2‑difluoroethane 76‑11‑9 500 4170 ‑ ‑ ‑ ‑  
1,1,2,2‑Tetrachloro‑1,2‑difluoroethane 76‑12‑0 500 4170 ‑ ‑ ‑ ‑  
1,1,2,2‑Tetrachloroethane 79‑34‑5 1 6.9 ‑ ‑ ‑ 1  
Tetrachloroethylene
(Perchloroethylene)		 127‑18‑4 25 170 ‑ 100 678 ‑  
Tetrachloromethane
(Carbon tetrachloride)		 56‑23‑5 5 31 ‑ 10 63 1 A2
Tetrachloronaphthalene 1335‑88‑2 ‑ 2 ‑ ‑ ‑ ‑  
Tetraethyl lead, as Pb 78‑00‑2 ‑ 0.1 ‑ ‑ ‑ 1  
Tetraethyl pyrophosphate (TEPP) 107‑49‑3 ‑ 0.05 ‑ ‑ ‑ 1  
Tetrafluoroethylene 116‑14‑3 2 8.2 ‑ ‑ ‑ ‑  
Tetrahydrofuran 109‑99‑9 50 147 ‑ 100 295 1  
Tetrakis (hydroxymethyl) phosphonium salts ‑‑Tetrakis (hydroxymethyl) phosphonium chloride ‑‑Tetrakis (hydroxymethyl) phosphonium sulfate

124‑64‑1

55566‑30‑8

‑

‑

2

2

‑

‑

‑

‑

‑

‑

3

3		  
Tetramethyl lead, as Pb 75‑74‑1 ‑ 0.15 ‑ ‑ ‑ 1  
Tetramethyl succinonitrile 3333‑52‑6 0.5 2.8 ‑ ‑ ‑ 1  
Tetranitromethane 509‑14‑8 0.005 0.04 ‑ ‑ ‑ 3  
Tetryl
(2,4,6‑Trinitrophenylmethylnitramine)		 479‑45‑8 ‑ 1.5 ‑ ‑ ‑ 3  
Thallium, elemental, and soluble
compounds, as Tl		 7440‑28‑0 ‑ 0.1 ‑ ‑ ‑ 1  
4,4’‑Thiobis (6‑tert‑butyl‑m‑cresol) 96‑69‑5 ‑ 10 ‑ ‑ ‑ ‑  
Thioglycolic acid 68‑11‑1 1 3.8 ‑ ‑ ‑ 1,3  
Thionyl chloride 7719‑09‑7 ‑ ‑ ‑ (c) 1 (c) 4.9 3  
Thiram 137‑26‑8 ‑ 1 ‑ ‑ ‑ ‑  
Tin, as Sn Metal Oxide and inorganic compounds except tin hydride Organic compounds 7440‑31‑5  
‑
‑

‑
2
2

0.1
‑
‑

‑
‑
‑

‑
‑
‑
  0.2
‑
‑

1		  
Titanium dioxide 13463‑67‑7 ‑ 10 ‑ ‑ ‑ 3  
Toluene (Toluol) 108‑88‑3 50 188 ‑ ‑ ‑ 1  
Toluene‑2,4 or 2,6‑diisocyanate
(or as mixture) (TDI)		 584‑84‑9
91‑08‑7		 0.005 0.04 ‑ (c) 0.02 (c) 0.1 ‑  
o‑Toluidine 95‑53‑4 2 8.8 ‑ ‑ ‑ 1  
m‑Toluidine 108‑44‑1 2 8.8 ‑ ‑ ‑ 1  
p‑Toluidine 106‑49‑0 2 8.8 ‑ ‑ ‑ 1  
Toluol (Toluene) 108‑88‑3 50 188 ‑ ‑ ‑ 1  
Toxaphene (Chlorinated camphene) 8001‑35‑2 ‑ 0.5 ‑ ‑ 1 1  
Tremolite (Asbestos) 1332‑21‑4 ‑ ‑ 0.1 ‑ ‑ ‑ A1
Tribromomethane (Bromoform) 75‑25‑2 0.5 5.2 ‑ ‑ ‑ 1  
Tributyl phosphate 126‑73‑8 0.2 2.2 ‑ ‑ ‑ ‑  
Trichloroacetic acid 76‑03‑9 1 6.7 ‑ ‑ ‑ 3  
1,2,4‑Trichlorobenzene 120‑82‑1 ‑ ‑ ‑ (c) 5 (c) 37 3  
1,1,1‑Trichloroethane
(Methyl chloroform)		 71‑55‑6 350 1910 ‑ 450 2460 ‑  
1,1,2‑Trichloroethane 79‑00‑5 10 55 ‑ ‑ ‑ 1  
Trichloroethylene 79‑01‑6 50 269 ‑ 100 537 ‑  
Trichlorofluoromethane
(Fluorotrichloromethane)		 75‑69‑4 ‑ ‑ ‑ (c) 1000 (c) 5620 ‑  
Trichloromethane (Chloroform) 67‑66‑3 10 49 ‑ ‑ ‑ ‑  
Trichloronaphthalene 1321‑65‑9 ‑ 5 ‑ ‑ ‑ 1  
Trichloronitromethane (Chloropicrin) 76‑06‑2 0.1 0.7 ‑ ‑ ‑ ‑  
2,4,5‑Trichlorophenoxy acetic acid
(2,4,5‑T)		 93‑76‑5 ‑ 10 ‑ ‑ ‑ ‑  
1,2,3‑Trichloropropane 96‑18‑4 10 60 ‑ ‑ ‑ 1  
1,1,2‑Trichloro‑1,2,2‑trifluoroethane 76‑13‑1 1000 7660 ‑ 1250 9580 ‑  
Trichlorphon 52‑68‑6 ‑ 1 ‑ ‑ ‑ ‑  
Tricyclohexyltin hydroxide (Cyhexatin) 13121‑70‑5 ‑ 5 ‑ ‑ ‑ ‑  
Triethanolamine 102‑71‑6 ‑ 5 ‑ ‑ ‑ 3  
Triethylamine 121‑44‑8 1 4.1 ‑ 3 12 1  
Trifluorobromomethane
(Bromotrifluoromethane)		 75‑63‑8 1000 6090 ‑ ‑ ‑ ‑  
1,1,1‑Trifluoro‑2,2‑dichloroethane
(HCFC‑123)		 306‑83‑2 50 310 ‑ ‑ ‑ ‑  
1,3,5‑Triglycidyl‑s‑triazinetrione 2451‑62‑9 ‑ 0.05 ‑ ‑ ‑ ‑  
Trimellitic anhydride 552‑30‑7 ‑ ‑ ‑ ‑ (c) 0.04 ‑  
Trimethylamine 75‑50‑3 5 12 ‑ 15 36 3  
Trimethyl benzene (mixed isomers) 25551‑13‑7 25 123 ‑ ‑ ‑ ‑  
Trimethyl phosphite 121‑45‑9 2 10 ‑ ‑ ‑ ‑  
2,4,6‑Trinitrophenol (Picric acid) 88‑89‑1 ‑ 0.1 ‑ ‑ ‑ ‑  
2,4,6‑Trinitrophenyl‑methylnitramine
(Tetryl)		 479‑45‑8 ‑ 1.5 ‑ ‑ ‑ 3  
2,4,6‑Trinitrotoluene (TNT) 118‑96‑7 ‑ 0.1 ‑ ‑ ‑ 1  
Triorthocresyl phosphate 78‑30‑8 ‑ 0.1 ‑ ‑ ‑ 1  
Triphenyl amine 603‑34‑9 ‑ 5 ‑ ‑ ‑ 3  
Triphenyl phosphate 115‑86‑6 ‑ 3 ‑ ‑ ‑ ‑  
Tungsten, as W Metal and insoluble compounds Soluble compounds 7440‑33‑7
‑
‑
5
1
‑
‑
‑
‑
10
3
3
‑		  
Turpentine
and selected monoterpenes 		8006‑64‑2
80‑56‑8
127‑91‑3
13466‑78‑9		 20 111 ‑ ‑ ‑ 3  
Uranium (natural), soluble & insoluble
compounds, as U 		7440‑61‑1 ‑ 0.2 ‑ ‑ 0.6 ‑ A1
n‑Valeraldehyde 110‑62‑3 50 176 ‑ ‑ ‑ 3  
Vanadium pentoxide, as V2O5 Respirable particulate or fume 1314‑62‑1   ‑   0.05   ‑   ‑   ‑   ‑  
Vinyl acetate 108‑05‑4 10 35 ‑ 15 53 ‑  
Vinyl benzene (Styrene, monomer) 100‑42‑5 20 85 ‑ 40 170 ‑  
Vinyl bromide 593‑60‑2 0.5 2.2 ‑ ‑ ‑ ‑ A2
Vinyl chloride (Chloroethylene) 75‑01‑4 1 2.6 ‑ ‑ ‑ ‑ A1
Vinyl cyanide (Acrylonitrile) 107‑13‑1 2 4.3 ‑ ‑ ‑ 1  
4‑Vinyl cyclohexene 100‑40‑3 0.1 0.4 ‑ ‑ ‑ ‑  
Vinyl cyclohexene dioxide 106‑87‑6 0.1 0.6 ‑ ‑ ‑ 1  
Vinyl fluoride 75‑02‑5 1 1.9 ‑ ‑ ‑ ‑ A2
Vinylidene chloride
(1,1‑Dichloroethylene)		 75‑35‑4 5 20 ‑ ‑ ‑ ‑  
Vinylidene fluoride
(1,1‑Difluoroethylene)		 75‑38‑7 500 1310 ‑ ‑ ‑ ‑  
N‑Vinyl‑2‑pyrrolidone 88‑12‑0 0.05 0.2 ‑ ‑ ‑ ‑  
Vinyl toluene
(Methyl styrene, all isomers)		 25013‑15‑4 50 242 ‑ 100 483 ‑  
VM & P Naphtha 8032‑32‑4 300 1400 ‑ ‑ ‑ ‑  
Warfarin 81‑81‑2 ‑ 0.1 ‑ ‑ ‑ ‑  
Wood Dust (Total) Softwoods and hardwoods except western red cedar Western red cedar  
‑

‑
5

0.5
‑

‑
‑

‑
‑

‑
‑

‑		 A1 – Oak, beech
A2 – Birch, mahogany, teak, walnut
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 ‑ ‑ ‑ ‑ (c) 0.1 1,3  
Xylidine (mixed isomers) 1300‑73‑8 0.5 2.5 ‑ ‑ ‑ 1  
Yttrium metal & compounds, as Y 7440‑65‑5 ‑ 1 ‑ ‑ ‑ ‑  
Zinc beryllium silicate, as Be 39413‑47‑3 ‑ 0.002 ‑ ‑ 0.01 ‑ A1
Zinc chloride fume 7646‑85‑7 ‑ 1 ‑ ‑ 2 3  
Zinc chromates, as Cr 13530‑65‑9
11103‑86‑9
37300‑23‑5		 ‑ 0.01 ‑ ‑ ‑ ‑ A1
Zinc oxide, respirable 1314‑13‑2 ‑ 2 ‑ ‑ 10 ‑  
Zinc stearate 557‑05‑1 ‑ 10 ‑ ‑ ‑ 3  
Zirconium and compounds, as Zr 7440‑67‑7 ‑ 5 ‑ ‑ 10 ‑