| Benzene | 156.28 |
| 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.) | 125.72 |
| Ethylene oxide | 124.16 |
| Cobalt | 104.23 |
| Nickel compounds | 43.80 |
| Chromium | 24.19 |
| Cadmium compounds | 11.65 |
| Triethylamine | 5.20 |
| Acetaldehyde | 4.70 |
| Acrylonitrile | 3.47 |
| Nickel | 2.84 |
| Diisocyanates | 2.47 |
| Ethylbenzene | 2.14 |
| Chlorine | 1.27 |
| Naphthalene | 1.00 |
| Toluene diisocyanate (mixed isomers) | 0.91 |
| Di(2-ethylhexyl) phthalate | 0.64 |
| Polycyclic aromatic compounds | 0.54 |
| Xylene (mixed isomers) | 0.35 |
| Antimony compounds | 0.23 |
| Nitric acid | 0.22 |
| Copper | 0.15 |
| N,N-Dimethylformamide | 0.15 |
| Manganese compounds | 0.14 |
| 1,2,4-Trimethylbenzene | 0.12 |
| n-Hexane (Hexane) | 0.08 |
| Maleic anhydride | 0.07 |
| 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) | 0.06 |
| Manganese | 0.05 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| Cyanide compounds | 0.05 |
| Lead | 0.04 |
| Lead compounds | 0.04 |
| Butyl acrylate | 0.03 |
| Formaldehyde | 0.03 |
| Toluene | 0.02 |
| Acetonitrile | 0.02 |
| Certain glycol ethers | 0.02 |
| Mercury compounds | 0.02 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.02 |
| Styrene | 0.01 |
| Methyl methacrylate | 0.01 |
| n-Butyl alcohol (1-Butanol) | 0.01 |
| Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.01 |
| Acrylic acid | 0.01 |
| Pyridine | 0.01 |
| Zinc compounds | 0.01 |
| Phenol | 0.00 |
| Acetophenone | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Silver compounds | 0.00 |
| Silver | 0.00 |
| Ethylene glycol | 0.00 |
| Vinyl acetate | 0.00 |
| Ethyl acrylate | 0.00 |
| Cyclohexane | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Cumene | 0.00 |
| Zinc (fume or dust) | 0.00 |
| Mercury | 0.00 |
| Methanol | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Biphenyl | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Phthalic anhydride | 0.00 |
| tert-Butyl alcohol (tert-Butanol) | 0.00 |
| Formic acid | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
