| 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.) | 106.99 |
| Ethylene oxide | 100.22 |
| Cobalt | 56.13 |
| Chromium | 33.06 |
| Cadmium compounds | 21.65 |
| Nickel | 14.14 |
| Diisocyanates | 6.65 |
| Benzene | 3.37 |
| Toluene diisocyanate (mixed isomers) | 2.56 |
| Polycyclic aromatic compounds | 2.28 |
| Chlorine | 1.20 |
| Nickel compounds | 1.03 |
| Formaldehyde | 0.68 |
| Chloroform | 0.63 |
| Antimony compounds | 0.56 |
| Di(2-ethylhexyl) phthalate | 0.52 |
| Acrylonitrile | 0.42 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.19 |
| Copper | 0.14 |
| Nitric acid | 0.09 |
| Xylene (mixed isomers) | 0.07 |
| 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) | 0.06 |
| Ethylbenzene | 0.05 |
| Acetonitrile | 0.04 |
| Aluminum (fume or dust) | 0.04 |
| Naphthalene | 0.03 |
| Certain glycol ethers | 0.03 |
| Lead compounds | 0.03 |
| Cyanide compounds | 0.03 |
| Lead | 0.03 |
| Triethylamine | 0.02 |
| Pyridine | 0.02 |
| Butyl acrylate | 0.02 |
| Maleic anhydride | 0.01 |
| Dichloromethane (Methylene chloride) | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Acetophenone | 0.01 |
| Phenol | 0.01 |
| N,N-Dimethylformamide | 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 |
| Zinc compounds | 0.01 |
| Mercury compounds | 0.01 |
| Manganese | 0.01 |
| 1,2,4-Trimethylbenzene | 0.01 |
| Silver compounds | 0.01 |
| Acrylic acid | 0.00 |
| Styrene | 0.00 |
| Methyl methacrylate | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Toluene | 0.00 |
| Silver | 0.00 |
| o-Xylene | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Vinyl acetate | 0.00 |
| Ethylene glycol | 0.00 |
| Methanol | 0.00 |
| Mercury | 0.00 |
| Ethyl acrylate | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Propylene oxide | 0.00 |
| Cyclohexane | 0.00 |
| Cumene | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Formic acid | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| tert-Butyl alcohol (tert-Butanol) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| MIXTURE | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
