| Chromium | 282.35 |
| Cobalt | 253.07 |
| Hydrazine | 77.81 |
| Trichloroethylene | 35.74 |
| Nickel | 22.26 |
| Nickel compounds | 16.94 |
| Chloroform | 7.94 |
| Diisocyanates | 7.14 |
| Benzene | 3.00 |
| Polycyclic aromatic compounds | 0.27 |
| Naphthalene | 0.17 |
| Toluene diisocyanate (mixed isomers) | 0.14 |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.12 |
| Ethylbenzene | 0.08 |
| Copper | 0.06 |
| Lead compounds | 0.03 |
| Hydrogen fluoride (Hydrofluoric acid) | 0.03 |
| Triethylamine | 0.02 |
| Zinc compounds | 0.02 |
| Xylene (mixed isomers) | 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 |
| Dichloromethane (Methylene chloride) | 0.01 |
| Nitric acid | 0.01 |
| Lead | 0.01 |
| n-Hexane (Hexane) | 0.01 |
| Antimony compounds | 0.01 |
| Silver compounds | 0.01 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 0.01 |
| 1,2,4-Trimethylbenzene | 0.00 |
| Toluene-2,4-diisocyanate | 0.00 |
| Manganese | 0.00 |
| Acetonitrile | 0.00 |
| Ethylene glycol | 0.00 |
| Toluene | 0.00 |
| N,N-Dimethylformamide | 0.00 |
| Methyl methacrylate | 0.00 |
| Certain glycol ethers | 0.00 |
| Cyclohexane | 0.00 |
| Benzo[g,h,i]perylene | 0.00 |
| Methanol | 0.00 |
| Sodium nitrite | 0.00 |
| Methyl isobutyl ketone | 0.00 |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0.00 |
| Formic acid | 0.00 |
| Benzoyl peroxide | 0.00 |
| N-Methyl-2-pyrrolidone | 0.00 |
Political Economy Research Institute
