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

Regulations

Hazardous Chemical Substances Regulations, 1995

Annexure 1

Occupational Exposure Limits - Control Limits

 

 

 

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