| Chromium | 131.81 |
| Cobalt | 118.78 |
| 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.) | 80.93 |
| Ethylene oxide | 63.10 |
| Trichloroethylene | 16.94 |
| Nickel | 9.06 |
| Nickel compounds | 7.82 |
| Diisocyanates | 6.05 |
| Lead | 5.87 |
| Chloroform | 4.59 |
| Cadmium compounds | 3.06 |
| Benzene | 1.89 |
| Antimony compounds | 0.76 |
| Di(2-ethylhexyl) phthalate | 0.60 |
| Maleic anhydride | 0.43 |
| Zinc compounds | 0.42 |
| Toluene diisocyanate (mixed isomers) | 0.41 |
| Formaldehyde | 0.38 |
| Polycyclic aromatic compounds | 0.36 |
| Dicyclopentadiene | 0.20 |
| Chlorine | 0.18 |
| Naphthalene | 0.09 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.09 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.07 |
| Acrylonitrile | 0.05 |
| Ethylbenzene | 0.05 |
| Copper | 0.05 |
| Xylene (mixed isomers) | 0.05 |
| Triethylamine | 0.04 |
| Peracetic acid | 0.04 |
| Dichloromethane (Methylene chloride) | 0.04 |
| Nitric acid | 0.04 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| Hydrogen cyanide | 0.03 |
| N,N-Dimethylformamide | 0.03 |
| Lead compounds | 0.03 |
| o-Xylene | 0.03 |
| Certain glycol ethers | 0.03 |
| Acetonitrile | 0.02 |
| Toluene | 0.01 |
| 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) | 0.01 |
| Pyridine | 0.01 |
| n-Hexane (Hexane) | 0.01 |
| Cyanide compounds | 0.00 |
| Butyl acrylate | 0.00 |
| Silver compounds | 0.00 |
| Ethylene glycol | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Methyl tert-butyl ether | 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 |
| Phenol | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Phthalic anhydride | 0.00 |
| Manganese | 0.00 |
| Methanol | 0.00 |
| Styrene | 0.00 |
| Methyl methacrylate | 0.00 |
| Mercury | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Silver | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| Vinyl acetate | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Formic acid | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Sodium nitrite | 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 |
