| Cobalt | 344.61 |
| 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.) | 162.08 |
| Chromium | 134.07 |
| Trichloroethylene | 18.86 |
| Nickel | 17.59 |
| Nickel compounds | 8.77 |
| Cadmium compounds | 5.48 |
| Chloroform | 4.74 |
| Diisocyanates | 4.27 |
| Benzene | 3.83 |
| Formaldehyde | 2.07 |
| Polycyclic aromatic compounds | 1.74 |
| Xylene (mixed isomers) | 1.67 |
| Toluene diisocyanate (mixed isomers) | 1.44 |
| Di(2-ethylhexyl) phthalate | 0.57 |
| Chlorine | 0.36 |
| Antimony compounds | 0.30 |
| Certain glycol ethers | 0.18 |
| Copper | 0.14 |
| Dichloromethane (Methylene chloride) | 0.10 |
| Naphthalene | 0.07 |
| Ethylbenzene | 0.06 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.06 |
| Lead | 0.04 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.04 |
| Lead compounds | 0.03 |
| Triethylamine | 0.02 |
| Acetonitrile | 0.02 |
| Nitric acid | 0.02 |
| Zinc compounds | 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 |
| n-Hexane (Hexane) | 0.01 |
| Butyl acrylate | 0.01 |
| 1,2,4-Trimethylbenzene | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Cyanide compounds | 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 |
| Maleic anhydride | 0.01 |
| Phenol | 0.00 |
| N,N-Dimethylformamide | 0.00 |
| Silver compounds | 0.00 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.00 |
| Pyridine | 0.00 |
| Acrylic acid | 0.00 |
| Toluene | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Acetophenone | 0.00 |
| o-Xylene | 0.00 |
| Manganese | 0.00 |
| Methyl methacrylate | 0.00 |
| Methanol | 0.00 |
| Mercury | 0.00 |
| Ethylene glycol | 0.00 |
| Vinyl acetate | 0.00 |
| Styrene | 0.00 |
| Propylene oxide | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Silver | 0.00 |
| Cyclohexane | 0.00 |
| Cumene | 0.00 |
| Formic acid | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Ethyl acrylate | 0.00 |
| tert-Butyl alcohol (tert-Butanol) | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
