| Chromium | 83.19 |
| Cobalt | 82.95 |
| Ethylene oxide | 16.67 |
| 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.) | 11.76 |
| Trichloroethylene | 8.86 |
| Nickel | 6.37 |
| Nickel compounds | 4.12 |
| Lead | 3.69 |
| Diisocyanates | 2.06 |
| Antimony compounds | 2.05 |
| Chloroform | 1.28 |
| Maleic anhydride | 0.95 |
| Dicyclopentadiene | 0.90 |
| Dichloromethane (Methylene chloride) | 0.61 |
| Formaldehyde | 0.42 |
| Di(2-ethylhexyl) phthalate | 0.26 |
| Zinc compounds | 0.26 |
| Polycyclic aromatic compounds | 0.15 |
| Acrylonitrile | 0.14 |
| Peracetic acid | 0.12 |
| Benzene | 0.07 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| Methyl tert-butyl ether | 0.04 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.03 |
| Nitric acid | 0.03 |
| N,N-Dimethylformamide | 0.03 |
| Toluene diisocyanate (mixed isomers) | 0.03 |
| Copper | 0.03 |
| Hydrogen cyanide | 0.03 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| Lead compounds | 0.02 |
| Ethylbenzene | 0.02 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 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 |
| Acetonitrile | 0.01 |
| Toluene | 0.01 |
| o-Xylene | 0.01 |
| Certain glycol ethers | 0.01 |
| Pyridine | 0.01 |
| Xylene (mixed isomers) | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Phthalic anhydride | 0.00 |
| Naphthalene | 0.00 |
| Phenol | 0.00 |
| Methanol | 0.00 |
| Ethylene glycol | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Silver compounds | 0.00 |
| Styrene | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Manganese | 0.00 |
| 1,2,4-Trimethylbenzene | 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 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Acetophenone | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 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 |
