| Chromium | 147.16 |
| Cobalt | 86.96 |
| Ethylene oxide | 7.70 |
| Nickel | 7.12 |
| Trichloroethylene | 6.98 |
| 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.) | 5.51 |
| Lead | 4.95 |
| Nickel compounds | 3.29 |
| Diisocyanates | 2.24 |
| Chloroform | 1.15 |
| Formaldehyde | 0.90 |
| Antimony compounds | 0.60 |
| Maleic anhydride | 0.56 |
| Dicyclopentadiene | 0.50 |
| Zinc compounds | 0.34 |
| Di(2-ethylhexyl) phthalate | 0.18 |
| Polycyclic aromatic compounds | 0.14 |
| Dichloromethane (Methylene chloride) | 0.07 |
| Acrylonitrile | 0.07 |
| Peracetic acid | 0.05 |
| Hydrogen cyanide | 0.04 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| N,N-Dimethylformamide | 0.04 |
| Nitric acid | 0.04 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.03 |
| Copper | 0.03 |
| Lead compounds | 0.03 |
| Toluene diisocyanate (mixed isomers) | 0.03 |
| Ethylbenzene | 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) | 0.01 |
| Triethylamine | 0.01 |
| Toluene | 0.01 |
| Certain glycol ethers | 0.01 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.01 |
| Butyl acrylate | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Xylene (mixed isomers) | 0.00 |
| Ethylene glycol | 0.00 |
| Phthalic anhydride | 0.00 |
| Silver compounds | 0.00 |
| o-Xylene | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Phenol | 0.00 |
| Methanol | 0.00 |
| Styrene | 0.00 |
| Manganese | 0.00 |
| Acetonitrile | 0.00 |
| Acrylic acid | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Ethyl acrylate | 0.00 |
| Methyl methacrylate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Sodium nitrite | 0.00 |
| Acetophenone | 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 |
