| 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.) | 126.67 |
| Chromium | 126.65 |
| Cobalt | 112.18 |
| Ethylene oxide | 73.45 |
| Nickel compounds | 47.98 |
| Cadmium compounds | 40.40 |
| Nickel | 27.56 |
| Benzene | 6.58 |
| Toluene diisocyanate (mixed isomers) | 5.87 |
| Diisocyanates | 3.96 |
| Acetaldehyde | 2.03 |
| Chlorine | 1.56 |
| Di(2-ethylhexyl) phthalate | 0.95 |
| Formaldehyde | 0.77 |
| Copper | 0.76 |
| Chloroform | 0.68 |
| Acrylonitrile | 0.62 |
| Polycyclic aromatic compounds | 0.61 |
| Antimony compounds | 0.53 |
| Lead compounds | 0.12 |
| Ethylbenzene | 0.11 |
| Xylene (mixed isomers) | 0.09 |
| Triethylamine | 0.08 |
| Butyl acrylate | 0.08 |
| Nitric acid | 0.06 |
| Lead | 0.06 |
| Manganese compounds | 0.06 |
| Naphthalene | 0.05 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| 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) | 0.04 |
| Acetonitrile | 0.04 |
| Cyanide compounds | 0.04 |
| Maleic anhydride | 0.04 |
| Certain glycol ethers | 0.04 |
| Manganese | 0.03 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.02 |
| Acrylic acid | 0.02 |
| Zinc compounds | 0.02 |
| N,N-Dimethylformamide | 0.01 |
| Dichloromethane (Methylene chloride) | 0.01 |
| 1,2,4-Trimethylbenzene | 0.01 |
| Methyl methacrylate | 0.01 |
| Silver compounds | 0.01 |
| Styrene | 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 |
| Mercury compounds | 0.01 |
| Phenol | 0.01 |
| Pyridine | 0.01 |
| n-Butyl alcohol (1-Butanol) | 0.01 |
| Acetophenone | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Vinyl acetate | 0.00 |
| Toluene | 0.00 |
| Silver | 0.00 |
| Ethylene glycol | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Mercury | 0.00 |
| Methanol | 0.00 |
| Zinc (fume or dust) | 0.00 |
| Ethyl acrylate | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Cyclohexane | 0.00 |
| Cumene | 0.00 |
| Propylene oxide | 0.00 |
| Biphenyl | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| tert-Butyl alcohol (tert-Butanol) | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 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 |
