| Cobalt | 278.98 |
| Chromium | 205.47 |
| Lead | 95.82 |
| 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.) | 63.78 |
| Hydrazine | 47.60 |
| Trichloroethylene | 25.38 |
| Ethylene oxide | 15.20 |
| Nickel | 12.80 |
| Nickel compounds | 10.75 |
| Chloroform | 8.27 |
| Zinc compounds | 6.73 |
| Diisocyanates | 6.54 |
| Benzene | 2.60 |
| Di(2-ethylhexyl) phthalate | 1.94 |
| Polycyclic aromatic compounds | 0.53 |
| Triethylamine | 0.38 |
| Copper | 0.32 |
| Hydrogen cyanide | 0.25 |
| Antimony compounds | 0.24 |
| Toluene diisocyanate (mixed isomers) | 0.20 |
| Formaldehyde | 0.19 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.17 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.16 |
| N,N-Dimethylformamide | 0.14 |
| Naphthalene | 0.13 |
| Ethylbenzene | 0.08 |
| Ethylene glycol | 0.05 |
| Toluene | 0.05 |
| Lead compounds | 0.05 |
| Xylene (mixed isomers) | 0.04 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.04 |
| n-Hexane (Hexane) | 0.02 |
| Dichloromethane (Methylene chloride) | 0.02 |
| Certain glycol ethers | 0.02 |
| Nitric acid | 0.01 |
| Toluene-2,4-diisocyanate | 0.01 |
| 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) | 0.01 |
| o-Xylene | 0.01 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Silver compounds | 0.00 |
| Manganese | 0.00 |
| Acetonitrile | 0.00 |
| Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.00 |
| Methyl methacrylate | 0.00 |
| Methanol | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| Mercury | 0.00 |
| Sodium nitrite | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Phenol | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Formic acid | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cumene | 0.00 |
| Styrene | 0.00 |
| Acetophenone | 0.00 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
