| Ethylene oxide | 103.42 |
| 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.) | 84.48 |
| Cobalt | 79.95 |
| Chromium | 72.34 |
| Trichloroethylene | 13.56 |
| Nickel | 9.47 |
| Nickel compounds | 6.40 |
| Diisocyanates | 5.65 |
| Lead | 4.07 |
| Cadmium compounds | 3.82 |
| Chloroform | 3.30 |
| Antimony compounds | 1.56 |
| Benzene | 1.38 |
| Toluene diisocyanate (mixed isomers) | 0.70 |
| Maleic anhydride | 0.54 |
| Di(2-ethylhexyl) phthalate | 0.34 |
| Formaldehyde | 0.33 |
| Polycyclic aromatic compounds | 0.30 |
| Zinc compounds | 0.29 |
| Chlorine | 0.24 |
| Dicyclopentadiene | 0.23 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.13 |
| Dichloromethane (Methylene chloride) | 0.10 |
| Copper | 0.08 |
| Xylene (mixed isomers) | 0.06 |
| Naphthalene | 0.06 |
| Acrylonitrile | 0.05 |
| Nitric acid | 0.05 |
| Peracetic acid | 0.05 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| Lead compounds | 0.04 |
| Ethylbenzene | 0.03 |
| Certain glycol ethers | 0.03 |
| Acetonitrile | 0.03 |
| Hydrogen cyanide | 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) | 0.02 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| N,N-Dimethylformamide | 0.02 |
| Triethylamine | 0.02 |
| Pyridine | 0.01 |
| Toluene | 0.01 |
| o-Xylene | 0.01 |
| Methyl tert-butyl ether | 0.01 |
| Phenol | 0.01 |
| Cyanide compounds | 0.01 |
| Butyl acrylate | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Aluminum (fume or dust) | 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 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Silver compounds | 0.00 |
| Acetophenone | 0.00 |
| Ethylene glycol | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Phthalic anhydride | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Manganese | 0.00 |
| Methanol | 0.00 |
| Styrene | 0.00 |
| Vinyl acetate | 0.00 |
| Methyl methacrylate | 0.00 |
| Mercury | 0.00 |
| Silver | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Formic acid | 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 |
| Benzoyl peroxide | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
