| Chromium | 125.07 |
| Cobalt | 116.15 |
| 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.) | 93.57 |
| Ethylene oxide | 64.58 |
| Trichloroethylene | 19.22 |
| Nickel | 10.23 |
| Nickel compounds | 8.74 |
| Lead | 7.45 |
| Diisocyanates | 5.64 |
| Chloroform | 4.92 |
| Cadmium compounds | 3.57 |
| Benzene | 2.11 |
| Formaldehyde | 0.71 |
| Antimony compounds | 0.57 |
| Di(2-ethylhexyl) phthalate | 0.54 |
| Zinc compounds | 0.53 |
| Toluene diisocyanate (mixed isomers) | 0.53 |
| Polycyclic aromatic compounds | 0.44 |
| Maleic anhydride | 0.37 |
| Chlorine | 0.21 |
| Dicyclopentadiene | 0.14 |
| Naphthalene | 0.10 |
| Copper | 0.09 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.08 |
| Xylene (mixed isomers) | 0.06 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.06 |
| Ethylbenzene | 0.06 |
| Acrylonitrile | 0.04 |
| Dichloromethane (Methylene chloride) | 0.04 |
| Triethylamine | 0.04 |
| Hydrogen cyanide | 0.04 |
| Peracetic acid | 0.03 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.03 |
| Certain glycol ethers | 0.03 |
| Nitric acid | 0.03 |
| Lead compounds | 0.03 |
| N,N-Dimethylformamide | 0.02 |
| Acetonitrile | 0.01 |
| o-Xylene | 0.01 |
| Toluene | 0.01 |
| 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 |
| Pyridine | 0.01 |
| n-Hexane (Hexane) | 0.01 |
| Cyanide compounds | 0.01 |
| Silver compounds | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Butyl acrylate | 0.00 |
| Ethylene glycol | 0.00 |
| Phenol | 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 |
| Methyl tert-butyl ether | 0.00 |
| Manganese | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Phthalic anhydride | 0.00 |
| Methanol | 0.00 |
| Methyl methacrylate | 0.00 |
| Styrene | 0.00 |
| Mercury | 0.00 |
| Silver | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| Propylene oxide | 0.00 |
| Vinyl acetate | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Formic acid | 0.00 |
| Sodium nitrite | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cumene | 0.00 |
| Benzoyl peroxide | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
