| 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 VI 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 |
0.4 | 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 |