| Ethylene oxide | 91.10 |
| 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.) | 77.51 |
| Chromium | 36.89 |
| Nickel | 17.66 |
| Maleic anhydride | 3.86 |
| Cadmium compounds | 3.10 |
| Diisocyanates | 2.39 |
| Antimony compounds | 1.37 |
| Dicyclopentadiene | 1.36 |
| Toluene diisocyanate (mixed isomers) | 0.41 |
| Acrylonitrile | 0.37 |
| Peracetic acid | 0.30 |
| Chlorine | 0.23 |
| Di(2-ethylhexyl) phthalate | 0.23 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.12 |
| Polycyclic aromatic compounds | 0.07 |
| Dichloromethane (Methylene chloride) | 0.07 |
| Formaldehyde | 0.06 |
| Nitric acid | 0.06 |
| Nickel compounds | 0.05 |
| Lead compounds | 0.03 |
| Butyl acrylate | 0.03 |
| Acetonitrile | 0.02 |
| Lead | 0.02 |
| Phenol | 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) | 0.02 |
| Copper | 0.02 |
| Pyridine | 0.01 |
| Phthalic anhydride | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Zinc compounds | 0.01 |
| Xylene (mixed isomers) | 0.01 |
| Cyanide compounds | 0.01 |
| Methyl tert-butyl ether | 0.00 |
| Ethylene glycol | 0.00 |
| Styrene | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Certain glycol ethers | 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 |
| Vinyl acetate | 0.00 |
| o-Xylene | 0.00 |
| Toluene | 0.00 |
| Acrylic acid | 0.00 |
| Acetophenone | 0.00 |
| Silver compounds | 0.00 |
| Ethyl acrylate | 0.00 |
| Methyl methacrylate | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Mercury | 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 |
| Formic acid | 0.00 |
| Silver | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| N,N-Dimethylformamide | 0.00 |
| Benzo[g,h,i]perylene | 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 |
| MIXTURE | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
