| Ethylene oxide | 188.97 |
| Chromium | 115.86 |
| Cobalt | 85.45 |
| 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.) | 76.23 |
| Trichloroethylene | 12.52 |
| Nickel | 8.39 |
| Nickel compounds | 5.94 |
| Diisocyanates | 5.76 |
| Lead | 3.76 |
| Chloroform | 3.35 |
| Cadmium compounds | 3.25 |
| Benzene | 1.35 |
| Antimony compounds | 1.30 |
| Maleic anhydride | 0.64 |
| Toluene diisocyanate (mixed isomers) | 0.48 |
| Formaldehyde | 0.41 |
| Di(2-ethylhexyl) phthalate | 0.40 |
| Dicyclopentadiene | 0.36 |
| Zinc compounds | 0.27 |
| Polycyclic aromatic compounds | 0.25 |
| Chlorine | 0.19 |
| Dichloromethane (Methylene chloride) | 0.16 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.09 |
| Acrylonitrile | 0.07 |
| Peracetic acid | 0.06 |
| Naphthalene | 0.06 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.05 |
| Nitric acid | 0.05 |
| Xylene (mixed isomers) | 0.04 |
| Copper | 0.04 |
| Ethylbenzene | 0.03 |
| N,N-Dimethylformamide | 0.03 |
| Triethylamine | 0.03 |
| Lead compounds | 0.02 |
| Certain glycol ethers | 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 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.02 |
| Acetonitrile | 0.02 |
| Methyl tert-butyl ether | 0.01 |
| Pyridine | 0.01 |
| o-Xylene | 0.01 |
| Toluene | 0.01 |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0.01 |
| Butyl acrylate | 0.01 |
| Cyanide compounds | 0.00 |
| Phenol | 0.00 |
| n-Hexane (Hexane) | 0.00 |
| Aluminum (fume or dust) | 0.00 |
| Silver compounds | 0.00 |
| Ethylene glycol | 0.00 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Phthalic anhydride | 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 |
| Toluene-2,4-diisocyanate | 0.00 |
| Methanol | 0.00 |
| Manganese | 0.00 |
| Styrene | 0.00 |
| Vinyl acetate | 0.00 |
| Methyl methacrylate | 0.00 |
| Acrylic acid | 0.00 |
| Ethyl acrylate | 0.00 |
| Mercury | 0.00 |
| Silver | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Cyclohexane | 0.00 |
| Formic acid | 0.00 |
| 3-Iodo-2-propynyl butylcarbamate | 0.00 |
| n-Butyl alcohol (1-Butanol) | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Cumene | 0.00 |
| Lithium carbonate | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
| Tetrabromobisphenol A | 0.00 |
| MIXTURE | 0.00 |
| Nonylphenol Ethoxylates | 0.00 |
