List of Regulated Substances under the Risk Management Program
The Risk Management Program rule provides a List of Regulated Substances under section 112(r) of the Clean Air Act. This includes their synonyms and threshold quantities (in pounds) to help assess if a process is subject to the RMP rule. Where the Clean Air Act Section 112(r) program has been delegated to a state, that state may have additional requirements for the federally listed chemicals, and/or additional listed chemicals.
| Chemical Name | CAS No. | Threshold Quantity (lbs.) |
|---|---|---|
| 1,1-Dichloroethylene | 75-35-4 | 10,000 |
| 1,1-Dimethyl hydrazine | 57-14-7 | 15,000 |
| 1,2-Ethanediamine | 107-15-3 | 20,000 |
| 1,2-Propadiene | 463-49-0 | 10,000 |
| 1,3-Butadiene | 106-99-0 | 10,000 |
| 1,3-Butadiene, 2-methyl- | 78-79-5 | 10,000 |
| 1,3-Pentadiene | 504-60-9 | 10,000 |
| 1-Buten-3-yne | 689-97-4 | 10,000 |
| 1-Butene | 106-98-9 | 10,000 |
| 1-Butyne | 107-00-6 | 10,000 |
| 1-Chloropropylene | 590-21-6 | 10,000 |
| 1-Pentene | 109-67-1 | 10,000 |
| 1-Propene | 115-07-1 | 10,000 |
| 1-Propene, 1-chloro- | 590-21-6 | 10,000 |
| 1-Propene, 2-chloro- | 557-98-2 | 10,000 |
| 1-Propene, 2-methyl- | 115-11-7 | 10,000 |
| 1-Propyne | 74-99-7 | 10,000 |
| 2,2-Dimethylpropane | 463-82-1 | 10,000 |
| 2-Butenal | 4170-30-3 | 20,000 |
| 2-Butenal, (e)- | 123-73-9 | 20,000 |
| 2-Butene | 107-01-7 | 10,000 |
| 2-Butene, (E) | 624-64-6 | 10,000 |
| 2-Butene-cis | 590-18-1 | 10,000 |
| 2-Butene-trans | 624-64-6 | 10,000 |
| 2-Chloropropylene | 557-98-2 | 10,000 |
| 2-Methyl-1-butene | 563-46-2 | 10,000 |
| 2-Methylpropene | 115-11-7 | 10,000 |
| 2-Pentene, (E)- | 646-04-8 | 10,000 |
| 2-Pentene, (Z)- | 627-20-3 | 10,000 |
| 2-Propanamine | 75-31-0 | 10,000 |
| 2-Propen-1-amine | 107-11-9 | 10,000 |
| 2-Propen-1-ol | 107-18-6 | 15,000 |
| 2-Propenal | 107-02-8 | 5,000 |
| 2-Propenenitrile | 107-13-1 | 20,000 |
| 2-Propenenitrile, 2-methyl- | 126-98-7 | 10,000 |
| 2-Propenoyl chloride | 814-68-6 | 5,000 |
| 3-Methyl-1-butene | 563-45-1 | 10,000 |
| Acetaldehyde | 75-07-0 | 10,000 |
| Acetic acid ethenyl ester | 108-05-4 | 15,000 |
| Acetylene | 74-86-2 | 10,000 |
| Acrolein | 107-02-8 | 5,000 |
| Acrylonitrile | 107-13-1 | 20,000 |
| Acrylyl chloride | 814-68-6 | 5,000 |
| Allyl alcohol | 107-18-6 | 15,000 |
| Allylamine | 107-11-9 | 10,000 |
| Ammonia (anhydrous) | 7664-41-7 | 10,000 |
| Ammonia (conc 20% or greater) | 7664-41-7 | 20,000 |
| Arsenous trichloride | 7784-34-1 | 15,000 |
| Arsine | 7784-42-1 | 1,000 |
| Aziridine | 151-56-4 | 10,000 |
| Aziridine, 2-methyl | 75-55-8 | 10,000 |
| Benzene,1,3-diisocyanato-2- methyl- |
91-08-7 | 10,000 |
| Benzene, 1,3- diisocyanatomethyl- |
26471-62-5 | 10,000 |
| Benzene, 2,4-diisocyanato-1- methyl- |
584-84-9 | 10,000 |
| Bis(chloromethyl) ether | 542-88-1 | 1,000 |
| Borane, trichloro- | 10294-34-5 | 5,000 |
| Borane, trifluoro- | 7637-07-2 | 5,000 |
| Boron trichloride | 10294-34-5 | 5,000 |
| Boron trifluoride | 7637-07-2 | 5,000 |
| Boron trifluoride compound with methyl ether (1:1) | 353-42-4 | 15,000 |
| Boron, trifluoro[oxybis [methane]]-, (T-4)- | 353-42-4 | 15,000 |
| Bromine | 7726-95-6 | 10,000 |
| Bromotrifluoroethylene | 598-73-2 | 10,000 |
| Butane | 106-97-8 | 10,000 |
| Butane, 2-methyl- | 78-78-4 | 10,000 |
| Butene | 25167-67-3 | 10,000 |
| Carbon disulfide | 75-15-0 | 20,000 |
| Carbon oxide sulfide (COS) | 463-58-1 | 10,000 |
| Carbonic dichloride | 75-44-5 | 500 |
| Carbonochloridic acid, 1-methylethyl ester | 108-23-6 | 15,000 |
| Carbonochloridic acid, methylester | 79-22-1 | 5,000 |
| Carbonochloridic acid, propylester | 109-61-5 | 15,000 |
| Carbonyl sulfide | 463-58-1 | 10,000 |
| Chlorine | 7782-50-5 | 2,500 |
| Chlorine dioxide | 10049-04-4 | 1,000 |
| Chlorine monoxide | 7791-21-1 | 10,000 |
| Chlorine oxide | 7791-21-1 | 10,000 |
| Chlorine oxide (ClO2) | 10049-04-4 | 1,000 |
| Chloroethane | 75-00-3 | 10,000 |
| Chloroform | 67-66-3 | 20,000 |
| Chloromethane | 74-87-3 | 10,000 |
| Chloromethyl ether | 542-88-1 | 1,000 |
| Chloromethyl methyl ether | 107-30-2 | 5,000 |
| Crotonaldehyde | 4170-30-3 | 20,000 |
| Crotonaldehyde, (E)- | 123-73-9 | 20,000 |
| Cyanogen | 460-19-5 | 10,000 |
| Cyanogen chloride | 506-77-4 | 10,000 |
| Cyanogen chloride ((CN)Cl) | 506-77-4 | 10,000 |
| Cyclohexanamine | 108-91-8 | 15,000 |
| Cyclohexylamine | 108-91-8 | 15,000 |
| Cyclopropane | 75-19-4 | 10,000 |
| Diborane | 19287-45-7 | 2,500 |
| Diborane(6) | 19287-45-7 | 2,500 |
| Dichloromethyl ether | 542-88-1 | 1,000 |
| Dichlorosilane | 4109-96-0 | 10,000 |
| Difluoroethane | 75-37-6 | 10,000 |
| Dimethylamine | 124-40-3 | 10,000 |
| Dimethyldichlorosilane | 75-78-5 | 5,000 |
| Dimethylhydrazine | 57-14-7 | 15,000 |
| Epichlorohydrin | 106-89-8 | 20,000 |
| Ethanamine | 75-04-7 | 10,000 |
| Ethane | 74-84-0 | 10,000 |
| Ethane, 1,1'-oxybis- | 60-29-7 | 10,000 |
| Ethane, 1,1-difluoro- | 75-37-6 | 10,000 |
| Ethane, chloro- | 75-00-3 | 10,000 |
| Ethanedinitrile | 460-19-5 | 10,000 |
| Ethaneperoxoic acid | 79-21-0 | 10,000 |
| Ethanethiol | 75-08-1 | 10,000 |
| Ethene | 74-85-1 | 10,000 |
| Ethene, 1,1-dichloro- | 75-35-4 | 10,000 |
| Ethene, 1,1-difluoro- | 75-38-7 | 10,000 |
| Ethene, bromotrifluoro- | 598-73-2 | 10,000 |
| Ethene, chloro- | 75-01-4 | 10,000 |
| Ethene, chlorotrifluoro- | 79-38-9 | 10,000 |
| Ethene, ethoxy- | 109-92-2 | 10,000 |
| Ethene, fluoro- | 75-02-5 | 10,000 |
| Ethene, methoxy- | 107-25-5 | 10,000 |
| Ethene, tetrafluoro- | 116-14-3 | 10,000 |
| Ethyl acetylene | 107-00-6 | 10,000 |
| Ethyl chloride | 75-00-3 | 10,000 |
| Ethyl cyanide | 107-12-0 | 10,000 |
| Ethyl ether | 60-29-7 | 10,000 |
| Ethyl mercaptan | 75-08-1 | 10,000 |
| Ethyl nitrite | 109-95-5 | 10,000 |
| Ethylene | 74-85-1 | 10,000 |
| Ethylene oxide | 75-21-8 | 10,000 |
| Ethylenediamine | 107-15-3 | 20,000 |
| Ethyleneimine | 151-56-4 | 10,000 |
| Ethyne | 74-86-2 | 10,000 |
| Fluorine | 7782-41-4 | 1,000 |
| Formaldehyde | 50-00-0 | 15,000 |
| Formaldehyde (solution) | 50-00-0 | 15,000 |
| Formic acid, methyl ester | 107-31-3 | 10,000 |
| Furan | 110-00-9 | 5,000 |
| Hydrazine | 302-01-2 | 15,000 |
| Hydrazine, 1,1-dimethyl- | 57-14-7 | 15,000 |
| Hydrazine, methyl- | 60-34-4 | 15,000 |
| Hydrochloric acid (conc 37% or greater) | 7647-01-0 | 15,000 |
| Hydrocyanic acid | 74-90-8 | 2,500 |
| Hydrofluoric acid (conc. 50% or greater) | 7664-39-3 | 1,000 |
| Hydrogen | 1333-74-0 | 10,000 |
| Hydrogen chloride (anhydrous) | 7647-01-0 | 5,000 |
| Hydrogen chloride (gas only) | 7647-01-0 | 5,000 |
| Hydrogen cyanide | 74-90-8 | 2,500 |
| Hydrogen fluoride (anhydrous) | 7664-39-3 | 1,000 |
| Hydrogen selenide | 7783-07-5 | 500 |
| Hydrogen sulfide | 7783-06-4 | 10,000 |
| Iron carbonyl (Fe(CO)5), (TB-5-11)- | 13463-40-6 | 2,500 |
| Iron, pentacarbonyl- | 13463-40-6 | 2,500 |
| Isobutane | 75-28-5 | 10,000 |
| Isobutyronitrile | 78-82-0 | 20,000 |
| Isopentane | 78-78-4 | 10,000 |
| Isoprene | 78-79-5 | 10,000 |
| Isopropyl chloride | 75-29-6 | 10,000 |
| Isopropyl chloroformate | 108-23-6 | 15,000 |
| Isopropylamine | 75-31-0 | 10,000 |
| Methacrylonitrile | 126-98-7 | 10,000 |
| Methenamine | 74-89-5 | 10,000 |
| Methenamine, N,N-dimethyl- | 75-50-3 | 10,000 |
| Methenamine, N-methyl- | 124-40-3 | 10,000 |
| Methane | 74-82-8 | 10,000 |
| Methane, chloro- | 74-87-3 | 10,000 |
| Methane, chloromethoxy- | 107-30-2 | 5,000 |
| Methane, isocyanato- | 624-83-9 | 10,000 |
| Methane, oxybis- | 115-10-6 | 10,000 |
| Methane, oxybis[chloro- | 542-88-1 | 1,000 |
| Methane, tetranitro- | 509-14-8 | 10,000 |
| Methane, trichloro- | 67-66-3 | 20,000 |
| Methanesulfonyl chloride, trichloro- | 594-42-3 | 10,000 |
| Methanethiol | 74-93-1 | 10,000 |
| Methyl chloride | 74-87-3 | 10,000 |
| Methyl chlorocarbonate | 79-22-1 | 5,000 |
| Methyl chloroformate | 79-22-1 | 5,000 |
| Methyl ether | 115-10-6 | 10,000 |
| Methyl formate | 107-31-3 | 10,000 |
| Methyl hydrazine | 60-34-4 | 15,000 |
| Methyl isocyanate | 624-83-9 | 10,000 |
| Methyl mercaptan | 74-93-1 | 10,000 |
| Methyl thiocyanate | 556-64-9 | 20,000 |
| Methyltrichlorosilane | 75-79-6 | 5,000 |
| Monoethylamine | 75-04-7 | 10,000 |
| Monomethylamine | 74-89-5 | 10,000 |
| Nickel carbonyl | 13463-39-3 | 1,000 |
| Nitric acid (conc 80% or greater) | 7697-37-2 | 15,000 |
| Nitric oxide | 10102-43-9 | 10,000 |
| Nitrogen oxide (NO) | 10102-43-9 | 10,000 |
| Nitrous acid, ethyl ester | 109-95-5 | 10,000 |
| Oleum (fuming sulfuric acid) | 8014-95-7 | 10,000 |
| Oxirane | 75-21-8 | 10,000 |
| Oxirane, (chloromethyl)- | 106-89-8 | 20,000 |
| Oxirane, methyl- | 75-56-9 | 10,000 |
| Pentane | 109-66-0 | 10,000 |
| Peracetic acid | 79-21-0 | 10,000 |
| Perchloromethyl mercaptan | 594-42-3 | 10,000 |
| Phosgene | 75-44-5 | 500 |
| Phosphine | 7803-51-2 | 5,000 |
| Phosphorous trichloride | 7719-12-2 | 15,000 |
| Phosphorus oxychloride | 10025-87-3 | 5,000 |
| Phosphorus trichloride | 7719-12-2 | 15,000 |
| Phosphoryl chloride | 10025-87-3 | 5,000 |
| Piperidine | 110-89-4 | 15,000 |
| Plumbane, tetramethyl- | 75-74-1 | 10,000 |
| Propadiene | 463-49-0 | 10,000 |
| Propane | 74-98-6 | 10,000 |
| Propane, 2,2-dimethyl- | 463-82-1 | 10,000 |
| Propane, 2-chloro- | 75-29-6 | 10,000 |
| Propane, 2-methyl | 75-28-5 | 10,000 |
| Propanenitrile | 107-12-0 | 10,000 |
| Propanenitrile, 2-methyl- | 78-82-0 | 20,000 |
| Propene | 115-07-1 | 10,000 |
| Propionitrile | 107-12-0 | 10,000 |
| Propyl chloroformate | 109-61-5 | 15,000 |
| Propylene | 115-07-1 | 10,000 |
| Propylene oxide | 75-56-9 | 10,000 |
| Propyleneimine | 75-55-8 | 10,000 |
| Propyne | 74-99-7 | 10,000 |
| Silane | 7803-62-5 | 10,000 |
| Silane, chlorotrimethyl- | 75-77-4 | 10,000 |
| Silane, dichloro- | 4109-96-0 | 10,000 |
| Silane, dichlorodimethyl- | 75-78-5 | 5,000 |
| Silane, tetramethyl- | 75-76-3 | 10,000 |
| Silane, trichloro- | 10025-78-2 | 10,000 |
| Silane, trichloromethyl- | 75-79-6 | 5,000 |
| Sulfur dioxide (anhydrous) | 7446-09-5 | 5,000 |
| Sulfur fluoride (SF4), (T-4)- | 7783-60-0 | 2,500 |
| Sulfur tetrafluoride | 7783-60-0 | 2,500 |
| Sulfur trioxide | 7446-11-9 | 10,000 |
| Sulfuric acid (fuming) | 8014-95-7 | 10,000 |
| Sulfuric acid, mixture with sulfur trioxide | 8014-95-7 | 10,000 |
| Tetrafluoroethylene | 116-14-3 | 10,000 |
| Tetramethyllead | 75-74-1 | 10,000 |
| Tetramethylsilane | 75-76-3 | 10,000 |
| Tetranitromethane | 509-14-8 | 10,000 |
| Thiocyanic acid, methyl ester | 556-64-9 | 20,000 |
| Thiomethanol | 74-93-1 | 10,000 |
| Titanium chloride (TiCl4) (T-4)- | 7550-45-0 | 2,500 |
| Titanium tetrachloride | 7550-45-0 | 2,500 |
| Toluene diisocyanate (unspecified isomer) | 26471-62-5 | 10,000 |
| Toluene-2,4-diisocyanate | 584-84-9 | 10,000 |
| Toluene-2,6-diisocyanate | 91-08-7 | 10,000 |
| Toluene diisocyanate (mixed isomers) | 26471-62-5 | 10,000 |
| Trichloromethanesulfonyl chloride | 594-42-3 | 10,000 |
| Trichlorosilane | 10025-78-2 | 10,000 |
| Trifluorochloroethylene | 79-38-9 | 10,000 |
| Trimethylamine | 75-50-3 | 10,000 |
| Trimethylchlorosilane | 75-77-4 | 10,000 |
| Vinyl acetate | 108-05-4 | 15,000 |
| Vinyl acetate monomer | 108-05-4 | 15,000 |
| Vinyl acetylene | 689-97-4 | 10,000 |
| Vinyl chloride | 75-01-4 | 10,000 |
| Vinyl ethyl ether | 109-92-2 | 10,000 |
| Vinyl fluoride | 75-02-5 | 10,000 |
| Vinyl methyl ether | 107-25-5 | 10,000 |
| Vinylidene chloride | 75-35-4 | 10,000 |
| Vinylidene fluoride | 75-38-7 | 10,000 |