| 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.) | 38.05 |
| Chromium | 37.08 |
| Cobalt | 34.57 |
| Ethylene oxide | 28.04 |
| Dicyclopentadiene | 7.27 |
| Nickel | 5.88 |
| Maleic anhydride | 4.13 |
| Trichloroethylene | 2.39 |
| Lead | 2.27 |
| Antimony compounds | 1.69 |
| Peracetic acid | 1.21 |
| Acrylonitrile | 1.19 |
| Diisocyanates | 0.23 |
| Di(2-ethylhexyl) phthalate | 0.19 |
| Formaldehyde | 0.19 |
| Zinc compounds | 0.17 |
| Butyl acrylate | 0.11 |
| Polycyclic aromatic compounds | 0.08 |
| Dichloromethane (Methylene chloride) | 0.07 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.04 |
| Nitric acid | 0.02 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.02 |
| Hydrogen cyanide | 0.01 |
| Phthalic anhydride | 0.01 |
| Toluene diisocyanate (mixed isomers) | 0.01 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.01 |
| Styrene | 0.01 |
| Acetonitrile | 0.01 |
| 1,2,4-Trimethylbenzene | 0.01 |
| Copper | 0.01 |
| Lead compounds | 0.01 |
| N,N-Dimethylformamide | 0.01 |
| Toluene | 0.01 |
| Pyridine | 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 |
| Methyl tert-butyl ether | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Certain glycol ethers | 0.00 |
| Methanol | 0.00 |
| o-Xylene | 0.00 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Ethylene glycol | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Methyl methacrylate | 0.00 |
| Phenol | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Vinyl acetate | 0.00 |
| Silver compounds | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Acetophenone | 0.00 |
| Manganese | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Formic acid | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cyanide compounds | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
