40 CFR 266, Appendix IV to Part 266 - Reference Air Concentrations*
Appendix IV to Part 266—Reference Air Concentrations*
| Constituent | CAS No. | RAC (ug/m3) |
|---|---|---|
| *The RAC for other appendix VIII part 261 constituents not listed herein or in appendix V of this part is 0.1 ug/m3. | ||
| 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 |
[56 FR 7232, Feb. 21, 1991; 56 FR 32691, July 17, 1991, as amended at 71 FR 40277, July 14, 2006]
Title 40 published on 2012-07-01
no entries appear in the Federal Register after this date.
This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.
This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].
It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.
