| Chromium | 500.29 |
| Cobalt | 413.28 |
| Benzene | 142.23 |
| 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.) | 88.47 |
| Chloroform | 61.23 |
| Trichloroethylene | 52.32 |
| Nickel | 44.23 |
| Nickel compounds | 23.26 |
| Hydrazine | 17.46 |
| Lead | 9.84 |
| Naphthalene | 9.32 |
| Diisocyanates | 6.25 |
| Ethylbenzene | 1.38 |
| Polycyclic aromatic compounds | 1.25 |
| Zinc compounds | 0.80 |
| Di(2-ethylhexyl) phthalate | 0.74 |
| Formaldehyde | 0.70 |
| Toluene diisocyanate (mixed isomers) | 0.67 |
| Xylene (mixed isomers) | 0.38 |
| 1,2,4-Trimethylbenzene | 0.22 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.18 |
| Lead compounds | 0.16 |
| Antimony compounds | 0.16 |
| Copper | 0.13 |
| Triethylamine | 0.10 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.07 |
| Hydrogen cyanide | 0.04 |
| Certain glycol ethers | 0.04 |
| Nitric acid | 0.04 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| n-Hexane (Hexane) | 0.04 |
| N,N-Dimethylformamide | 0.03 |
| 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) | 0.03 |
| Dichloromethane (Methylene chloride) | 0.03 |
| Toluene | 0.02 |
| Silver compounds | 0.01 |
| Toluene-2,4-diisocyanate | 0.01 |
| Ethylene glycol | 0.00 |
| Manganese | 0.00 |
| Acetonitrile | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| o-Xylene | 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 |
| Phenol | 0.00 |
| Methanol | 0.00 |
| Cyclohexane | 0.00 |
| Mercury | 0.00 |
| Propylene oxide | 0.00 |
| Styrene | 0.00 |
| Sodium nitrite | 0.00 |
| Cumene | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
