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

Contents

 

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