| Chromium | 166.53 |
| Cobalt | 111.57 |
| Ethylene oxide | 27.67 |
| Trichloroethylene | 11.57 |
| Nickel | 9.86 |
| Lead | 6.67 |
| Nickel compounds | 5.35 |
| 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.) | 5.21 |
| Diisocyanates | 3.45 |
| Chloroform | 3.11 |
| Benzene | 1.03 |
| Formaldehyde | 0.86 |
| Antimony compounds | 0.56 |
| Maleic anhydride | 0.49 |
| Zinc compounds | 0.46 |
| Di(2-ethylhexyl) phthalate | 0.40 |
| Polycyclic aromatic compounds | 0.36 |
| Dicyclopentadiene | 0.33 |
| Dichloromethane (Methylene chloride) | 0.06 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.06 |
| Toluene diisocyanate (mixed isomers) | 0.06 |
| Acrylonitrile | 0.06 |
| Naphthalene | 0.05 |
| Hydrogen cyanide | 0.05 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.05 |
| N,N-Dimethylformamide | 0.05 |
| Peracetic acid | 0.05 |
| Copper | 0.04 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| Nitric acid | 0.03 |
| Lead compounds | 0.03 |
| Ethylbenzene | 0.03 |
| Triethylamine | 0.03 |
| Toluene | 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 |
| Certain glycol ethers | 0.01 |
| Acetonitrile | 0.01 |
| o-Xylene | 0.01 |
| Xylene (mixed isomers) | 0.01 |
| n-Hexane (Hexane) | 0.01 |
| Butyl acrylate | 0.00 |
| Pyridine | 0.00 |
| Methyl tert-butyl ether | 0.00 |
| Ethylene glycol | 0.00 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.00 |
| Silver compounds | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Phenol | 0.00 |
| Phthalic anhydride | 0.00 |
| 1,2,4-Trimethylbenzene | 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 |
| 3-Iodo-2-propynyl butylcarbamate | 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 |
| Benzoyl peroxide | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
