| Ethylene oxide | 119.03 |
| Chromium compounds (except for chromite ore mined in the Transvaal Region of South Africa and the unreacted ore component of the chromite ore processing residue (COPR). COPR is the solid waste remaining after aqueous extraction of oxidized chromite ore that has been combined with soda ash and kiln roasted at approximately 2,000 F.) | 110.99 |
| Cobalt | 108.01 |
| Benzene | 43.32 |
| Nickel compounds | 39.02 |
| Chromium | 27.97 |
| Cadmium compounds | 15.90 |
| Acetaldehyde | 3.59 |
| Nickel | 3.55 |
| Diisocyanates | 2.79 |
| Acrylonitrile | 2.39 |
| Di(2-ethylhexyl) phthalate | 1.65 |
| Triethylamine | 1.44 |
| Chlorine | 1.37 |
| Toluene diisocyanate (mixed isomers) | 1.15 |
| Ethylbenzene | 0.60 |
| Antimony compounds | 0.55 |
| Naphthalene | 0.47 |
| Formaldehyde | 0.36 |
| Polycyclic aromatic compounds | 0.31 |
| 1,2,4-Trimethylbenzene | 0.21 |
| Nitric acid | 0.21 |
| Copper | 0.16 |
| Xylene (mixed isomers) | 0.14 |
| Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 0.13 |
| Manganese compounds | 0.09 |
| N,N-Dimethylformamide | 0.08 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.06 |
| Cyanide compounds | 0.05 |
| Maleic anhydride | 0.05 |
| Lead compounds | 0.04 |
| Manganese | 0.04 |
| Lead | 0.04 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.04 |
| Butyl acrylate | 0.02 |
| Acetonitrile | 0.02 |
| n-Hexane (Hexane) | 0.02 |
| Certain glycol ethers | 0.02 |
| Mercury compounds | 0.01 |
| Styrene | 0.01 |
| Methyl methacrylate | 0.01 |
| n-Butyl alcohol (1-Butanol) | 0.01 |
| Toluene | 0.01 |
| Zinc compounds | 0.01 |
| Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.01 |
| Phenol | 0.01 |
| Acetophenone | 0.01 |
| Pyridine | 0.01 |
| Acrylic acid | 0.00 |
| Silver compounds | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Silver | 0.00 |
| Ethylene glycol | 0.00 |
| Vinyl acetate | 0.00 |
| Ethyl acrylate | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Cumene | 0.00 |
| Cyclohexane | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Mercury | 0.00 |
| Zinc (fume or dust) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Methanol | 0.00 |
| Biphenyl | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Phthalic anhydride | 0.00 |
| tert-Butyl alcohol (tert-Butanol) | 0.00 |
| Formic acid | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
