| Cobalt | 355.51 |
| Chromium | 191.62 |
| 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.) | 156.76 |
| Trichloroethylene | 28.03 |
| Nickel | 20.37 |
| Ethylene oxide | 20.09 |
| Chloroform | 16.05 |
| Nickel compounds | 12.77 |
| Benzene | 6.88 |
| Lead | 6.43 |
| Cadmium compounds | 4.78 |
| Diisocyanates | 4.06 |
| Formaldehyde | 1.21 |
| Toluene diisocyanate (mixed isomers) | 1.14 |
| Polycyclic aromatic compounds | 1.02 |
| Di(2-ethylhexyl) phthalate | 0.50 |
| Zinc compounds | 0.47 |
| Xylene (mixed isomers) | 0.38 |
| Chlorine | 0.30 |
| Naphthalene | 0.25 |
| Antimony compounds | 0.16 |
| Copper | 0.14 |
| Ethylbenzene | 0.12 |
| Certain glycol ethers | 0.09 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.09 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| Triethylamine | 0.05 |
| Dichloromethane (Methylene chloride) | 0.04 |
| Lead compounds | 0.04 |
| Hydrogen cyanide | 0.03 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.03 |
| Nitric acid | 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) | 0.02 |
| Acetonitrile | 0.02 |
| 1,2,4-Trimethylbenzene | 0.01 |
| n-Hexane (Hexane) | 0.01 |
| Toluene | 0.01 |
| N,N-Dimethylformamide | 0.01 |
| Silver compounds | 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.) | 0.00 |
| Pyridine | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| o-Xylene | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Ethylene glycol | 0.00 |
| Manganese | 0.00 |
| Phenol | 0.00 |
| Methyl methacrylate | 0.00 |
| Methanol | 0.00 |
| Mercury | 0.00 |
| Cyclohexane | 0.00 |
| Propylene oxide | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Silver | 0.00 |
| Styrene | 0.00 |
| Vinyl acetate | 0.00 |
| Cumene | 0.00 |
| Formic acid | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
