| Chromium | 225.03 |
| Cobalt | 71.87 |
| Ethylene oxide | 7.91 |
| Nickel | 5.99 |
| Trichloroethylene | 5.89 |
| Lead | 4.42 |
| 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.) | 4.29 |
| Nickel compounds | 2.78 |
| Diisocyanates | 2.25 |
| Formaldehyde | 1.64 |
| Chloroform | 1.09 |
| Maleic anhydride | 0.50 |
| Antimony compounds | 0.47 |
| Dicyclopentadiene | 0.39 |
| Zinc compounds | 0.30 |
| Di(2-ethylhexyl) phthalate | 0.16 |
| Polycyclic aromatic compounds | 0.12 |
| Acrylonitrile | 0.07 |
| Peracetic acid | 0.06 |
| Nitric acid | 0.05 |
| Dichloromethane (Methylene chloride) | 0.05 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.05 |
| N,N-Dimethylformamide | 0.04 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| Toluene diisocyanate (mixed isomers) | 0.04 |
| Hydrogen cyanide | 0.04 |
| Copper | 0.03 |
| Lead compounds | 0.03 |
| Certain glycol ethers | 0.02 |
| Ethylbenzene | 0.02 |
| Toluene | 0.02 |
| 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 |
| Triethylamine | 0.01 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.01 |
| Butyl acrylate | 0.01 |
| n-Hexane (Hexane) | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Ethylene glycol | 0.00 |
| Phthalic anhydride | 0.00 |
| o-Xylene | 0.00 |
| Silver compounds | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Phenol | 0.00 |
| Styrene | 0.00 |
| Methanol | 0.00 |
| Manganese | 0.00 |
| Acetonitrile | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Methyl methacrylate | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Sodium nitrite | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Acetophenone | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Formic acid | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
