40 CFR Appendix IV to Part 266 - Appendix IV to Part 266—Reference Air Concentrations*
Appendix IV to Part 266—Reference Air Concentrations*
Constituent | CAS No. | RAC (ug/m 3) |
---|---|---|
Acetaldehyde | 75–07–0 | 10 |
Acetonitrile | 75–05–8 | 10 |
Acetophenone | 98–86–2 | 100 |
Acrolein | 107–02–8 | 20 |
Aldicarb | 116–06–3 | 1 |
Aluminum Phosphide | 20859–73–8 | 0.3 |
Allyl Alcohol | 107–18–6 | 5 |
Antimony | 7440–36–0 | 0.3 |
Barium | 7440–39–3 | 50 |
Barium Cyanide | 542–62–1 | 50 |
Bromomethane | 74–83–9 | 0.8 |
Calcium Cyanide | 592–01–8 | 30 |
Carbon Disulfide | 75–15–0 | 200 |
Chloral | 75–87–6 | 2 |
Chlorine (free) | 0.4 | |
2-Chloro-1,3-butadiene | 126–99–8 | 3 |
Chromium III | 16065–83–1 | 1000 |
Copper Cyanide | 544–92–3 | 5 |
Cresols | 1319–77–3 | 50 |
Cumene | 98–82–8 | 1 |
Cyanide (free) | 57–12–15 | 20 |
Cyanogen | 460–19–5 | 30 |
Cyanogen Bromide | 506–68–3 | 80 |
Di-n-butyl Phthalate | 84–74–2 | 100 |
o-Dichlorobenzene | 95–50–1 | 10 |
p-Dichlorobenzene | 106–46–7 | 10 |
Dichlorodifluoromethane | 75–71–8 | 200 |
2,4-Dichlorophenol | 120–83–2 | 3 |
Diethyl Phthalate | 84–66–2 | 800 |
Dimethoate | 60–51–5 | 0.8 |
2,4-Dinitrophenol | 51–28–5 | 2 |
Dinoseb | 88–85–7 | 0.9 |
Diphenylamine | 122–39–4 | 20 |
Endosulfan | 115–29–1 | 0.05 |
Endrin | 72–20–8 | 0.3 |
Fluorine | 7782–41–4 | 50 |
Formic Acid | 64–18–6 | 2000 |
Glycidyaldehyde | 765–34–4 | 0.3 |
Hexachlorocyclopentadiene | 77–47–4 | 5 |
Hexachlorophene | 70–30–4 | 0.3 |
Hydrocyanic Acid | 74–90–8 | 20 |
Hydrogen Chloride | 7647–01–1 | 7 |
Hydrogen Sulfide | 7783–06–4 | 3 |
Isobutyl Alcohol | 78–83–1 | 300 |
Lead | 7439–92–1 | 0.09 |
Maleic Anhydride | 108–31–6 | 100 |
Mercury | 7439–97–6 | 0.3 |
Methacrylonitrile | 126–98–7 | 0.1 |
Methomyl | 16752–77–5 | 20 |
Methoxychlor | 72–43–5 | 50 |
Methyl Chlorocarbonate | 79–22–1 | 1000 |
Methyl Ethyl Ketone | 78–93–3 | 80 |
Methyl Parathion | 298–00–0 | 0.3 |
Nickel Cyanide | 557–19–7 | 20 |
Nitric Oxide | 10102–43–9 | 100 |
Nitrobenzene | 98–95–3 | 0.8 |
Pentachlorobenzene | 608–93–5 | 0.8 |
Pentachlorophenol | 87–86–5 | 30 |
Phenol | 108–95–2 | 30 |
M-Phenylenediamine | 108–45–2 | 5 |
Phenylmercuric Acetate | 62–38–4 | 0.075 |
Phosphine | 7803–51–2 | 0.3 |
Phthalic Anhydride | 85–44–9 | 2000 |
Potassium Cyanide | 151–50–8 | 50 |
Potassium Silver Cyanide | 506–61–6 | 200 |
Pyridine | 110–86–1 | 1 |
Selenious Acid | 7783–60–8 | 3 |
Selenourea | 630–10–4 | 5 |
Silver | 7440–22–4 | 3 |
Silver Cyanide | 506–64–9 | 100 |
Sodium Cyanide | 143–33–9 | 30 |
Strychnine | 57–24–9 | 0.3 |
1,2,4,5-Tetrachlorobenzene | 95–94–3 | 0.3 |
2,3,4,6-Tetrachlorophenol | 58–90–2 | 30 |
Tetraethyl Lead | 78–00–2 | 0.0001 |
Tetrahydrofuran | 109–99–9 | 10 |
Thallic Oxide | 1314–32–5 | 0.3 |
Thallium | 7440–28–0 | 0.5 |
Thallium (I) Acetate | 563–68–8 | 0.5 |
Thallium (I) Carbonate | 6533–73–9 | 0.3 |
Thallium (I) Chloride | 7791–12–0 | 0.3 |
Thallium (I) Nitrate | 10102–45–1 | 0.5 |
Thallium Selenite | 12039–52–0 | 0.5 |
Thallium (I) Sulfate | 7446–18–6 | 0.075 |
Thiram | 137–26–8 | 5 |
Toluene | 108–88–3 | 300 |
1,2,4-Trichlorobenzene | 120–82–1 | 20 |
Trichloromonofluoromethane | 75–69–4 | 300 |
2,4,5-Trichlorophenol | 95–95–4 | 100 |
Vanadium Pentoxide | 1314–62–1 | 20 |
Warfarin | 81–81–2 | 0.3 |
Xylenes | 1330–20–7 | 80 |
Zinc Cyanide | 557–21–1 | 50 |
Zinc Phosphide | 1314–84–7 | 0.3 |
*The RAC for other appendix VIII part 261 constituents not listed herein or in appendix V of this part is 0.1 ug/m. 3