| Cobalt | 75.31 |
| Chromium | 68.28 |
| Ethylene oxide | 33.35 |
| 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.) | 32.81 |
| Antimony compounds | 9.86 |
| Trichloroethylene | 9.44 |
| Nickel | 6.55 |
| Nickel compounds | 3.61 |
| Lead | 3.00 |
| Diisocyanates | 1.76 |
| Dicyclopentadiene | 1.71 |
| Maleic anhydride | 1.44 |
| Chloroform | 1.12 |
| Formaldehyde | 0.32 |
| Zinc compounds | 0.22 |
| Di(2-ethylhexyl) phthalate | 0.21 |
| Acrylonitrile | 0.21 |
| Peracetic acid | 0.19 |
| Dichloromethane (Methylene chloride) | 0.13 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.12 |
| Polycyclic aromatic compounds | 0.07 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| 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 | 0.02 |
| Copper | 0.02 |
| Hydrogen cyanide | 0.02 |
| Lead compounds | 0.02 |
| Toluene diisocyanate (mixed isomers) | 0.02 |
| Butyl acrylate | 0.02 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| Methanol | 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 |
| Acetonitrile | 0.01 |
| Methyl tert-butyl ether | 0.01 |
| Triethylamine | 0.01 |
| Toluene | 0.01 |
| Pyridine | 0.01 |
| Phthalic anhydride | 0.00 |
| Certain glycol ethers | 0.00 |
| o-Xylene | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Phenol | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Ethylene glycol | 0.00 |
| Styrene | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Silver compounds | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Manganese | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Vinyl acetate | 0.00 |
| Methyl methacrylate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Acetophenone | 0.00 |
| Formic acid | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Cyanide compounds | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
