| Chromium | 178.67 |
| Cobalt | 111.27 |
| Ethylene oxide | 22.73 |
| Trichloroethylene | 11.44 |
| Lead | 10.44 |
| Nickel | 9.29 |
| Nickel compounds | 5.25 |
| Diisocyanates | 4.41 |
| 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.) | 4.04 |
| Chloroform | 3.31 |
| Benzene | 1.06 |
| Formaldehyde | 0.98 |
| Polycyclic aromatic compounds | 0.97 |
| Zinc compounds | 0.72 |
| Antimony compounds | 0.45 |
| Maleic anhydride | 0.40 |
| Di(2-ethylhexyl) phthalate | 0.32 |
| Dicyclopentadiene | 0.23 |
| Toluene diisocyanate (mixed isomers) | 0.08 |
| Hydrogen cyanide | 0.08 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.07 |
| N,N-Dimethylformamide | 0.07 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.06 |
| Copper | 0.06 |
| Naphthalene | 0.06 |
| Acrylonitrile | 0.05 |
| Peracetic acid | 0.05 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| Triethylamine | 0.04 |
| Lead compounds | 0.04 |
| Dichloromethane (Methylene chloride) | 0.03 |
| Ethylbenzene | 0.03 |
| Nitric acid | 0.03 |
| Toluene | 0.03 |
| Certain glycol ethers | 0.01 |
| 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 |
| Acetonitrile | 0.01 |
| Xylene (mixed isomers) | 0.01 |
| o-Xylene | 0.01 |
| Butyl acrylate | 0.00 |
| Ethylene glycol | 0.00 |
| Pyridine | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Silver compounds | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Phthalic anhydride | 0.00 |
| Phenol | 0.00 |
| Manganese | 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 |
| Cyclohexane | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Sodium nitrite | 0.00 |
| Vinyl acetate | 0.00 |
| Acetophenone | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 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 |
