| Chromium | 142.42 |
| Cobalt | 134.49 |
| Hydrazine | 71.92 |
| Lead | 23.86 |
| Trichloroethylene | 15.07 |
| Nickel | 8.84 |
| Nickel compounds | 6.81 |
| Chloroform | 4.08 |
| Diisocyanates | 3.76 |
| Zinc compounds | 1.67 |
| Benzene | 1.37 |
| Copper | 0.66 |
| 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.) | 0.62 |
| Di(2-ethylhexyl) phthalate | 0.55 |
| N,N-Dimethylformamide | 0.49 |
| Toluene diisocyanate (mixed isomers) | 0.39 |
| Polycyclic aromatic compounds | 0.32 |
| n-Hexane (Hexane) | 0.32 |
| Formaldehyde | 0.26 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.17 |
| Hydrogen cyanide | 0.16 |
| Antimony compounds | 0.10 |
| Naphthalene | 0.07 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.07 |
| Toluene | 0.06 |
| Lead compounds | 0.05 |
| Triethylamine | 0.05 |
| Ethylbenzene | 0.04 |
| Ethylene glycol | 0.03 |
| Dichloromethane (Methylene chloride) | 0.02 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.02 |
| Xylene (mixed isomers) | 0.02 |
| Nitric acid | 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 | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| o-Xylene | 0.00 |
| Silver compounds | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Manganese | 0.00 |
| Acetonitrile | 0.00 |
| Methanol | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Methyl methacrylate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| Sodium nitrite | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Acetophenone | 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 |
| Formic acid | 0.00 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
