| Ethylene oxide | 79.41 |
| Chromium | 45.98 |
| 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.) | 30.92 |
| Nickel | 11.46 |
| Maleic anhydride | 4.60 |
| Dicyclopentadiene | 1.83 |
| Diisocyanates | 1.42 |
| Antimony compounds | 0.70 |
| Acrylonitrile | 0.41 |
| Peracetic acid | 0.32 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.07 |
| Lead | 0.05 |
| Formaldehyde | 0.04 |
| Polycyclic aromatic compounds | 0.04 |
| Lead compounds | 0.04 |
| Nickel compounds | 0.03 |
| Butyl acrylate | 0.03 |
| 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) | 0.03 |
| Nitric acid | 0.03 |
| Dichloromethane (Methylene chloride) | 0.03 |
| Phenol | 0.03 |
| Acetonitrile | 0.02 |
| Phthalic anhydride | 0.01 |
| N,N-Dimethylformamide | 0.01 |
| Pyridine | 0.01 |
| Xylene (mixed isomers) | 0.01 |
| Ethylene glycol | 0.00 |
| Zinc compounds | 0.00 |
| Styrene | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Vinyl acetate | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Chlorine | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Certain glycol ethers | 0.00 |
| Copper | 0.00 |
| Toluene | 0.00 |
| Acrylic acid | 0.00 |
| o-Xylene | 0.00 |
| Acetophenone | 0.00 |
| Methyl methacrylate | 0.00 |
| Ethyl acrylate | 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 |
| Methanol | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Silver | 0.00 |
| Formic acid | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Cyanide compounds | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Mercury | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| MIXTURE | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
