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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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
Substance	CAS number	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	‑	‑	‑	‑