| Chromium | 43.96 |
| Ethylene oxide | 16.76 |
| Cobalt | 14.78 |
| Trichloroethylene | 7.25 |
| Nickel | 5.25 |
| 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.) | 4.28 |
| Dicyclopentadiene | 3.50 |
| Maleic anhydride | 2.31 |
| Acrylonitrile | 0.23 |
| Peracetic acid | 0.19 |
| Antimony compounds | 0.17 |
| Polycyclic aromatic compounds | 0.15 |
| Diisocyanates | 0.13 |
| Dichloromethane (Methylene chloride) | 0.12 |
| Formaldehyde | 0.09 |
| Butyl acrylate | 0.02 |
| Lead | 0.02 |
| Phthalic anhydride | 0.01 |
| Styrene | 0.00 |
| Nitric acid | 0.00 |
| Copper | 0.00 |
| Di(2-ethylhexyl) phthalate | 0.00 |
| 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) | 0.00 |
| Toluene diisocyanate (mixed isomers) | 0.00 |
| Lead compounds | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Acetonitrile | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Certain glycol ethers | 0.00 |
| Zinc compounds | 0.00 |
| Phenol | 0.00 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Acrylic acid | 0.00 |
| o-Xylene | 0.00 |
| Methyl methacrylate | 0.00 |
| Ethyl acrylate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Ethylene glycol | 0.00 |
| Toluene | 0.00 |
| N,N-Dimethylformamide | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Methanol | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Vinyl acetate | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Manganese | 0.00 |
| Acetophenone | 0.00 |
| Formic acid | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Cyanide compounds | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
