| Cobalt | 86.22 |
| Chromium | 82.52 |
| 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.) | 11.80 |
| Trichloroethylene | 9.54 |
| Ethylene oxide | 9.17 |
| Nickel | 7.07 |
| Nickel compounds | 3.78 |
| Lead | 3.47 |
| Antimony compounds | 2.03 |
| Diisocyanates | 1.99 |
| Chloroform | 1.37 |
| Dicyclopentadiene | 1.10 |
| Maleic anhydride | 0.95 |
| Formaldehyde | 0.40 |
| Dichloromethane (Methylene chloride) | 0.32 |
| Zinc compounds | 0.24 |
| Di(2-ethylhexyl) phthalate | 0.24 |
| Acrylonitrile | 0.14 |
| Peracetic acid | 0.12 |
| Polycyclic aromatic compounds | 0.06 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.04 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| N,N-Dimethylformamide | 0.03 |
| Nitric acid | 0.03 |
| Copper | 0.03 |
| Toluene diisocyanate (mixed isomers) | 0.03 |
| Hydrogen cyanide | 0.02 |
| Methyl tert-butyl ether | 0.02 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.02 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| Lead compounds | 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 |
| Butyl acrylate | 0.01 |
| Triethylamine | 0.01 |
| Toluene | 0.01 |
| Acetonitrile | 0.01 |
| Certain glycol ethers | 0.01 |
| Pyridine | 0.00 |
| Phthalic anhydride | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Methanol | 0.00 |
| o-Xylene | 0.00 |
| Ethylene glycol | 0.00 |
| Styrene | 0.00 |
| Silver compounds | 0.00 |
| Phenol | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Manganese | 0.00 |
| Acrylic acid | 0.00 |
| Vinyl acetate | 0.00 |
| Ethyl acrylate | 0.00 |
| Methyl methacrylate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Acetophenone | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Formic acid | 0.00 |
| Cyanide compounds | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
