| Chromium | 159.56 |
| Cobalt | 147.88 |
| 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.) | 58.92 |
| Lead | 46.63 |
| Hydrazine | 29.32 |
| Ethylene oxide | 21.16 |
| Trichloroethylene | 14.85 |
| Nickel | 10.83 |
| Nickel compounds | 6.84 |
| Diisocyanates | 4.90 |
| Chloroform | 4.78 |
| Polycyclic aromatic compounds | 4.14 |
| Zinc compounds | 3.26 |
| Benzene | 1.86 |
| Formaldehyde | 0.42 |
| Di(2-ethylhexyl) phthalate | 0.41 |
| Hydrogen cyanide | 0.37 |
| Antimony compounds | 0.36 |
| Maleic anhydride | 0.29 |
| Toluene diisocyanate (mixed isomers) | 0.21 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.18 |
| Copper | 0.17 |
| N,N-Dimethylformamide | 0.14 |
| Dicyclopentadiene | 0.12 |
| Triethylamine | 0.09 |
| Naphthalene | 0.09 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.09 |
| Toluene | 0.06 |
| Ethylbenzene | 0.05 |
| Lead compounds | 0.05 |
| Acrylonitrile | 0.04 |
| Xylene (mixed isomers) | 0.04 |
| Peracetic acid | 0.04 |
| Dichloromethane (Methylene chloride) | 0.02 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.02 |
| n-Hexane (Hexane) | 0.02 |
| Nitric acid | 0.02 |
| o-Xylene | 0.01 |
| Ethylene glycol | 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 |
| Certain glycol ethers | 0.01 |
| Toluene-2,4-diisocyanate | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Butyl acrylate | 0.00 |
| Silver compounds | 0.00 |
| Manganese | 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 |
| Methanol | 0.00 |
| Acetonitrile | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Phthalic anhydride | 0.00 |
| Phenol | 0.00 |
| Methyl methacrylate | 0.00 |
| Styrene | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Mercury | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Cyclohexane | 0.00 |
| Sodium nitrite | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Formic acid | 0.00 |
| Acetophenone | 0.00 |
| Cumene | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Benzoyl peroxide | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
