| Chromium | 95.87 |
| Cobalt | 88.26 |
| 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.) | 62.45 |
| Ethylene oxide | 24.00 |
| Trichloroethylene | 9.92 |
| Nickel | 6.09 |
| Nickel compounds | 4.64 |
| Lead | 4.34 |
| Chloroform | 2.38 |
| Diisocyanates | 2.35 |
| Antimony compounds | 1.01 |
| Maleic anhydride | 0.75 |
| Dicyclopentadiene | 0.62 |
| Formaldehyde | 0.53 |
| Dichloromethane (Methylene chloride) | 0.42 |
| Benzene | 0.36 |
| Di(2-ethylhexyl) phthalate | 0.32 |
| Zinc compounds | 0.30 |
| Polycyclic aromatic compounds | 0.20 |
| Acrylonitrile | 0.10 |
| Peracetic acid | 0.08 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| Toluene diisocyanate (mixed isomers) | 0.03 |
| N,N-Dimethylformamide | 0.03 |
| Copper | 0.03 |
| Hydrogen cyanide | 0.03 |
| Nitric acid | 0.03 |
| Methyl tert-butyl ether | 0.03 |
| Lead compounds | 0.03 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| Ethylbenzene | 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 |
| Naphthalene | 0.02 |
| Triethylamine | 0.01 |
| Toluene | 0.01 |
| Acetonitrile | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Butyl acrylate | 0.01 |
| o-Xylene | 0.01 |
| Certain glycol ethers | 0.01 |
| Pyridine | 0.01 |
| Xylene (mixed isomers) | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Ethylene glycol | 0.00 |
| Phenol | 0.00 |
| Phthalic anhydride | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Silver compounds | 0.00 |
| Methanol | 0.00 |
| 1,2,4-Trimethylbenzene | 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 |
| Toluene-2,4-diisocyanate | 0.00 |
| Styrene | 0.00 |
| Manganese | 0.00 |
| Vinyl acetate | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Methyl methacrylate | 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 |
| 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 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
