| Chromium | 166.55 |
| Cobalt | 123.62 |
| 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.) | 60.66 |
| Ethylene oxide | 32.86 |
| Trichloroethylene | 13.84 |
| Nickel | 9.61 |
| Lead | 9.14 |
| Nickel compounds | 6.38 |
| Diisocyanates | 3.98 |
| Chloroform | 3.76 |
| Benzene | 1.18 |
| Formaldehyde | 0.75 |
| Zinc compounds | 0.64 |
| Polycyclic aromatic compounds | 0.54 |
| Di(2-ethylhexyl) phthalate | 0.51 |
| Antimony compounds | 0.51 |
| Maleic anhydride | 0.42 |
| Dicyclopentadiene | 0.24 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.07 |
| Toluene diisocyanate (mixed isomers) | 0.07 |
| Naphthalene | 0.06 |
| N,N-Dimethylformamide | 0.06 |
| Copper | 0.05 |
| Hydrogen cyanide | 0.05 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.05 |
| Acrylonitrile | 0.04 |
| Triethylamine | 0.04 |
| Peracetic acid | 0.04 |
| Ethylbenzene | 0.04 |
| Lead compounds | 0.04 |
| Dichloromethane (Methylene chloride) | 0.04 |
| Nitric acid | 0.03 |
| o-Xylene | 0.02 |
| Toluene | 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) | 0.01 |
| Certain glycol ethers | 0.01 |
| Acetonitrile | 0.01 |
| n-Hexane (Hexane) | 0.01 |
| Xylene (mixed isomers) | 0.01 |
| Pyridine | 0.00 |
| Ethylene glycol | 0.00 |
| Butyl acrylate | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Silver compounds | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Phenol | 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 |
| Phthalic anhydride | 0.00 |
| Manganese | 0.00 |
| Methanol | 0.00 |
| Styrene | 0.00 |
| Methyl methacrylate | 0.00 |
| Acrylic acid | 0.00 |
| Mercury | 0.00 |
| Ethyl acrylate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Sodium nitrite | 0.00 |
| Vinyl acetate | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Acetophenone | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Formic acid | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cyanide compounds | 0.00 |
| Benzoyl peroxide | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
