| Ethylene oxide | 186.97 |
| Chromium | 112.50 |
| Cobalt | 74.50 |
| 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.) | 72.87 |
| Trichloroethylene | 10.53 |
| Nickel | 8.15 |
| Diisocyanates | 5.25 |
| Nickel compounds | 4.97 |
| Lead | 3.74 |
| Chloroform | 2.76 |
| Antimony compounds | 1.41 |
| Benzene | 1.02 |
| Maleic anhydride | 0.74 |
| Dicyclopentadiene | 0.49 |
| Formaldehyde | 0.44 |
| Toluene diisocyanate (mixed isomers) | 0.38 |
| Di(2-ethylhexyl) phthalate | 0.32 |
| Zinc compounds | 0.26 |
| Dichloromethane (Methylene chloride) | 0.25 |
| Polycyclic aromatic compounds | 0.22 |
| Acrylonitrile | 0.08 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.08 |
| Peracetic acid | 0.07 |
| Naphthalene | 0.06 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.04 |
| Nitric acid | 0.04 |
| Xylene (mixed isomers) | 0.04 |
| Copper | 0.03 |
| Ethylbenzene | 0.03 |
| N,N-Dimethylformamide | 0.03 |
| Lead compounds | 0.03 |
| Certain glycol ethers | 0.02 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| Hydrogen cyanide | 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) | 0.02 |
| Methyl tert-butyl ether | 0.02 |
| Triethylamine | 0.02 |
| Acetonitrile | 0.02 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Pyridine | 0.01 |
| Toluene | 0.01 |
| o-Xylene | 0.01 |
| Butyl acrylate | 0.01 |
| Phenol | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Ethylene glycol | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Phthalic anhydride | 0.00 |
| Silver compounds | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 0.00 |
| Methanol | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Styrene | 0.00 |
| Manganese | 0.00 |
| Vinyl acetate | 0.00 |
| Acrylic acid | 0.00 |
| Methyl methacrylate | 0.00 |
| Ethyl acrylate | 0.00 |
| Mercury | 0.00 |
| Silver | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Formic acid | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cyanide compounds | 0.00 |
| Acetophenone | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
| MIXTURE | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
