| Chromium | 141.47 |
| Cobalt | 105.63 |
| Ethylene oxide | 82.04 |
| 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.) | 69.36 |
| Nickel | 12.26 |
| Trichloroethylene | 11.84 |
| Nickel compounds | 5.40 |
| Lead | 5.03 |
| Chloroform | 3.14 |
| Diisocyanates | 2.84 |
| Benzene | 1.10 |
| Antimony compounds | 0.78 |
| Maleic anhydride | 0.58 |
| Formaldehyde | 0.50 |
| Zinc compounds | 0.35 |
| Dicyclopentadiene | 0.35 |
| Di(2-ethylhexyl) phthalate | 0.34 |
| Polycyclic aromatic compounds | 0.25 |
| Dichloromethane (Methylene chloride) | 0.10 |
| Acrylonitrile | 0.07 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.07 |
| Peracetic acid | 0.06 |
| Naphthalene | 0.06 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.05 |
| Copper | 0.04 |
| Toluene diisocyanate (mixed isomers) | 0.04 |
| Nitric acid | 0.04 |
| N,N-Dimethylformamide | 0.04 |
| Xylene (mixed isomers) | 0.03 |
| Ethylbenzene | 0.03 |
| Lead compounds | 0.03 |
| Hydrogen cyanide | 0.03 |
| o-Xylene | 0.03 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.03 |
| Certain glycol ethers | 0.02 |
| Triethylamine | 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 | 0.01 |
| Toluene | 0.01 |
| Methyl tert-butyl ether | 0.01 |
| Pyridine | 0.01 |
| Butyl acrylate | 0.01 |
| n-Hexane (Hexane) | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Ethylene glycol | 0.00 |
| Phenol | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Silver compounds | 0.00 |
| Phthalic anhydride | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Toluene-2,4-diisocyanate | 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 |
| Manganese | 0.00 |
| Methanol | 0.00 |
| Styrene | 0.00 |
| Methyl methacrylate | 0.00 |
| Vinyl acetate | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Mercury | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Sodium nitrite | 0.00 |
| Formic acid | 0.00 |
| Acetophenone | 0.00 |
| Methyl isobutyl ketone | 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 |
