| Cobalt | 91.93 |
| Chromium | 49.84 |
| 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.) | 9.58 |
| Ethylene oxide | 9.31 |
| Nickel | 9.29 |
| Lead | 2.92 |
| Trichloroethylene | 2.40 |
| Dicyclopentadiene | 2.10 |
| Antimony compounds | 2.08 |
| Diisocyanates | 1.51 |
| Maleic anhydride | 1.37 |
| Chloroform | 0.98 |
| Formaldehyde | 0.26 |
| Acrylonitrile | 0.23 |
| Zinc compounds | 0.20 |
| Peracetic acid | 0.20 |
| Di(2-ethylhexyl) phthalate | 0.16 |
| Dichloromethane (Methylene chloride) | 0.08 |
| Polycyclic aromatic compounds | 0.05 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.03 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.02 |
| N,N-Dimethylformamide | 0.02 |
| Butyl acrylate | 0.02 |
| Hydrogen cyanide | 0.02 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| Toluene diisocyanate (mixed isomers) | 0.02 |
| Lead compounds | 0.01 |
| Nitric acid | 0.01 |
| Copper | 0.01 |
| Triethylamine | 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 |
| Toluene | 0.01 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.01 |
| Methyl tert-butyl ether | 0.00 |
| Phthalic anhydride | 0.00 |
| Certain glycol ethers | 0.00 |
| Methanol | 0.00 |
| Styrene | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Ethylene glycol | 0.00 |
| o-Xylene | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Acetonitrile | 0.00 |
| Manganese | 0.00 |
| Phenol | 0.00 |
| Methyl methacrylate | 0.00 |
| Vinyl acetate | 0.00 |
| Silver compounds | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Acetophenone | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Formic acid | 0.00 |
| Cyanide compounds | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
