Occupational Health and Safety Act, 1993 (Act No. 85 of 1993)

Regulations

Hazardous Chemical Substances Regulations, 1995

Annexure 1

Occupational Exposure Limits - Control Limits

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Substance

TWA OEL-RL ppm

TWA OEL-RL mg/m³

Short Term OEL-RL ppm

Short Term OEL-RL mg/m³

1995 Notes

Acrylamide

CH2=CHCONH2

-

0.3

-

-

Sk

Acrylonitrile

CH2=CHCN

2

4



Sk

Arsenic and compounds

As

-

0.1

-

-

except Arsine (as As)

Asbestos - all forms





See Asbestos Regulations

Benzene

C6H6

5

16




Bis-(chloromethyl) ether (BCME)

ClCH2OCH2Cl

0.001

0.005



New

Buta-1,3-diene

CH2=CHCH=CH2

10

22




2-Butoxyethanol (EGBE)

C4H9OCH2CH2OH

25

120



Sk

Cadmium compounds except CdO fumes and CdS

Cd

-

0.05

-

-


Cadmium Oxide fumes

CdO


0.05


0.05


Cadmium Sulphide pigments (respirable dust Cd)

CdS


0.04




Carbon Disulphide

CS2

10

30



Sk

Chromium IV compounds


0.05




1,2 Dibromoethane (ethylene dibromide)

BrCH2CH2Br

0.5

4



Sk

Dichloromethane

CH2Cl2

100

350




2,2'Dichloro-4,4'methylene dianiline (MbOCA)

CH3(C6H3ClNH2)2


0.005



Sk

2-Ethoxyethanol

C2H5OCH2CH2OH

10

37



Sk

2-Ethoxyethyl acetate

C2H5OCH2CH2OOCCH3

10

54



Sk

Ethylene oxide

5

10




Formaldehyde

2

2.5

2

2.5


Grain dust

See Annexure 7


10



Sen

Hydrogen cyanide



10

10

Sk

Isocyanate (all isomers) as NCO


0.02


0.07

Sen

Lead and compounds- as Pb





See the Lead Regulations

2-Methoxyethanol

CH3OCH2CH2OH

5

16



Sk

2-Methoxyethyl acetate

CH3COOCH2CH2OCH3

5

24



Sk

Nickel

Ni


0.05




Nickel compounds

as Ni


0.1 0.5



soluble insoluble

Rubber process dust


8



See Annexure 6

Rubber fume


0.6




Silica crystalline

SiO2


0.1



respirable dust

Styrene

C6H5CHCH2

100

420

250

1050


1,1,1-Trichloroethane

CH3CCl3

350

1900

450

2450


Trichloroethylene

CCl2=CHCl

100

535

150

802

Skin

Vinyl chloride

CH2=CHCl

7




annual TWA OEL-CL of 3 ppm

Vinylidene chloride

CH2=CCl2

10

40




Wood dust (hard wood)


5



Sen