| Dicyclopentadiene | 59.52 |
| Cobalt | 30.54 |
| Chromium | 25.57 |
| Maleic anhydride | 21.87 |
| Acrylonitrile | 19.67 |
| Peracetic acid | 15.95 |
| Ethylene oxide | 14.98 |
| 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.) | 6.65 |
| Nickel | 5.08 |
| Trichloroethylene | 3.15 |
| Lead | 2.00 |
| Butyl acrylate | 1.85 |
| Antimony compounds | 0.59 |
| Diisocyanates | 0.18 |
| Zinc compounds | 0.14 |
| Formaldehyde | 0.13 |
| Phthalic anhydride | 0.09 |
| Styrene | 0.06 |
| Dichloromethane (Methylene chloride) | 0.06 |
| Acrylic acid | 0.06 |
| Ethyl acrylate | 0.05 |
| Polycyclic aromatic compounds | 0.05 |
| Hydrogen cyanide | 0.01 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.01 |
| Toluene diisocyanate (mixed isomers) | 0.01 |
| Methyl methacrylate | 0.01 |
| Copper | 0.01 |
| Nitric acid | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Toluene | 0.00 |
| Lead compounds | 0.00 |
| N,N-Dimethylformamide | 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 |
| Ethylene glycol | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Certain glycol ethers | 0.00 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| o-Xylene | 0.00 |
| Di(2-ethylhexyl) phthalate | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Methanol | 0.00 |
| Acetonitrile | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Phenol | 0.00 |
| Vinyl acetate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Silver compounds | 0.00 |
| Acetophenone | 0.00 |
| Manganese | 0.00 |
| Formic acid | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cyanide compounds | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
