| Chromium | 192.24 |
| Cobalt | 91.75 |
| Ethylene oxide | 18.31 |
| Lead | 10.41 |
| Nickel | 8.80 |
| Trichloroethylene | 8.77 |
| Diisocyanates | 4.68 |
| Nickel compounds | 4.11 |
| 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.) | 3.62 |
| Chloroform | 2.86 |
| Formaldehyde | 1.23 |
| Benzene | 1.04 |
| Zinc compounds | 0.71 |
| Polycyclic aromatic compounds | 0.71 |
| Antimony compounds | 0.47 |
| Maleic anhydride | 0.37 |
| Di(2-ethylhexyl) phthalate | 0.25 |
| Dicyclopentadiene | 0.22 |
| Toluene diisocyanate (mixed isomers) | 0.09 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.08 |
| Hydrogen cyanide | 0.08 |
| N,N-Dimethylformamide | 0.07 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.06 |
| Naphthalene | 0.05 |
| Copper | 0.05 |
| Lead compounds | 0.04 |
| Acrylonitrile | 0.04 |
| Dichloromethane (Methylene chloride) | 0.04 |
| Peracetic acid | 0.04 |
| Ethylbenzene | 0.03 |
| Nitric acid | 0.03 |
| Toluene | 0.03 |
| Triethylamine | 0.03 |
| Certain glycol ethers | 0.02 |
| n-Hexane (Hexane) | 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 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.01 |
| Xylene (mixed isomers) | 0.01 |
| o-Xylene | 0.00 |
| Ethylene glycol | 0.00 |
| Butyl acrylate | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Silver compounds | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Phthalic anhydride | 0.00 |
| Phenol | 0.00 |
| Manganese | 0.00 |
| Acetonitrile | 0.00 |
| Methanol | 0.00 |
| Styrene | 0.00 |
| Methyl methacrylate | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Cyclohexane | 0.00 |
| Sodium nitrite | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Acetophenone | 0.00 |
| Formic acid | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Benzoyl peroxide | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
