| 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.) | 92.51 |
| Ethylene oxide | 87.73 |
| Chromium | 73.76 |
| Cobalt | 72.91 |
| Trichloroethylene | 11.55 |
| Nickel | 10.25 |
| Diisocyanates | 5.77 |
| Nickel compounds | 5.44 |
| Cadmium compounds | 4.64 |
| Lead | 3.92 |
| Chloroform | 2.87 |
| Antimony compounds | 1.70 |
| Benzene | 1.16 |
| Toluene diisocyanate (mixed isomers) | 0.81 |
| Maleic anhydride | 0.58 |
| Formaldehyde | 0.52 |
| Di(2-ethylhexyl) phthalate | 0.49 |
| Polycyclic aromatic compounds | 0.30 |
| Chlorine | 0.30 |
| Zinc compounds | 0.28 |
| Dicyclopentadiene | 0.21 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.16 |
| Copper | 0.13 |
| Dichloromethane (Methylene chloride) | 0.10 |
| Nitric acid | 0.07 |
| Xylene (mixed isomers) | 0.07 |
| Acrylonitrile | 0.06 |
| Peracetic acid | 0.05 |
| Naphthalene | 0.04 |
| Lead compounds | 0.04 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| Acetonitrile | 0.03 |
| Certain glycol ethers | 0.03 |
| Ethylbenzene | 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 |
| Hydrogen cyanide | 0.03 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| N,N-Dimethylformamide | 0.02 |
| Pyridine | 0.02 |
| Triethylamine | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Toluene | 0.01 |
| Phenol | 0.01 |
| Cyanide compounds | 0.01 |
| Methyl tert-butyl ether | 0.01 |
| Aluminum (fume or dust) | 0.00 |
| o-Xylene | 0.00 |
| Butyl 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 |
| n-Hexane (Hexane) | 0.00 |
| Acetophenone | 0.00 |
| Silver compounds | 0.00 |
| Ethylene glycol | 0.00 |
| Phthalic anhydride | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Styrene | 0.00 |
| Methanol | 0.00 |
| Manganese | 0.00 |
| Mercury | 0.00 |
| Silver | 0.00 |
| Acrylic acid | 0.00 |
| Methyl methacrylate | 0.00 |
| Ethyl acrylate | 0.00 |
| Vinyl acetate | 0.00 |
| Formic acid | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Propylene oxide | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 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 |
| Cumene | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| MIXTURE | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
