40 C.F.R. § 68.130
Current through October 31, 2024
Table 1 to § 68.130 -List of Regulated Toxic Substances and Threshold Quantities for Accidental Release Prevention
[Alphabetical Order-77 Substances]
| Chemical name | CAS No. | Threshold quantity (lbs) | Basis for listing |
| Acrolein [2-Propenal] | 107-02-8 | 5,000 | b |
| Acrylonitrile [2-Propenenitrile] | 107-13-1 | 20,000 | b |
| Acrylyl chloride [2-Propenoyl chloride] | 814-68-6 | 5,000 | b |
| Allyl alcohol [2-Propen-l-ol] | 107-18-6 | 15,000 | b |
| Allylamine [2-Propen-l-amine] | 107-11-9 | 10,000 | b |
| Ammonia (anhydrous) | 7664-41-7 | 10,000 | a, b |
| Ammonia (conc 20% or greater) | 7664-41-7 | 20,000 | a, b |
| Arsenous trichloride | 7784-34-1 | 15,000 | b |
| Arsine | 7784-42-1 | 1,000 | b |
| Boron trichloride [Borane, trichloro-] | 10294-34-5 | 5,000 | b |
| Boron trifluoride [Borane, trifluoro-] | 7637-07-2 | 5,000 | b |
| Boron trifluoride compound with methyl ether (1:1) [Boron, trifluoro [oxybis [metane]]-, T-4- | 353-42-4 | 15,000 | b |
| Bromine | 7726-95-6 | 10,000 | a, b |
| Carbon disulfide | 75-15-0 | 20,000 | b |
| Chlorine | 7782-50-5 | 2,500 | a, b |
| Chlorine dioxide [Chlorine oxide (ClO2)] | 10049-04-4 | 1,000 | c |
| Chloroform [Methane, trichloro-] | 67-66-3 | 20,000 | b |
| Chloromethyl ether [Methane, oxybis[chloro-] | 542-88-1 | 1,000 | b |
| Chloromethyl methyl ether [Methane, chloromethoxy-] | 107-30-2 | 5,000 | b |
| Crotonaldehyde [2-Butenal] | 4170-30-3 | 20,000 | b |
| Crotonaldehyde, (E)- [2-Butenal, (E)-] | 123-73-9 | 20,000 | b |
| Cyanogen chloride | 506-77-4 | 10,000 | c |
| Cyclohexylamine [Cyclohexanamine] | 108-91-8 | 15,000 | b |
| Diborane | 19287-45-7 | 2,500 | b |
| Dimethyldichlorosilane [Silane, dichlorodimethyl-] | 75-78-5 | 5,000 | b |
| 1,1-Dimethylhydrazine [Hydrazine, 1,1-dimethyl-] | 57-14-7 | 15,000 | b |
| Epichlorohydrin [Oxirane, (chloromethyl)-] | 106-89-8 | 20,000 | b |
| Ethylenediamine [1,2-Ethanediamine] | 107-15-3 | 20,000 | b |
| Ethyleneimine [Aziridine] | 151-56-4 | 10,000 | b |
| Ethylene oxide [Oxirane] | 75-21-8 | 10,000 | a, b |
| Fluorine | 7782-41-4 | 1,000 | b |
| Formaldehyde (solution) | 50-00-0 | 15,000 | b |
| Furan | 110-00-9 | 5,000 | b |
| Hydrazine | 302-01-2 | 15,000 | b |
| Hydrochloric acid (conc 37% or greater) | 7647-01-0 | 15,000 | d |
| Hydrocyanic acid | 74-90-8 | 2,500 | a, b |
| Hydrogen chloride (anhydrous) [Hydrochloric acid] | 7647-01-0 | 5,000 | a |
| Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid] | 7664-39-3 | 1,000 | a, b |
| Hydrogen selenide | 7783-07-5 | 500 | b |
| Hydrogen sulfide | 7783-06-4 | 10,000 | a, b |
| Iron, pentacarbonyl- [Iron carbonyl (Fe(CO)5), (TB-5-11)-] | 13463-40-6 | 2,500 | b |
| Isobutyronitrile [Propanenitrile, 2-methyl-] | 78-82-0 | 20,000 | b |
| Isopropyl chloroformate [Carbonochloridic acid, 1-methylethyl ester] | 108-23-6 | 15,000 | b |
| Methacrylonitrile [2-Propenenitrile, 2-methyl-] | 126-98-7 | 10,000 | b |
| Methyl chloride [Methane, chloro-] | 74-87-3 | 10,000 | a |
| Methyl chloroformate [Carbonochloridic acid, methylester] | 79-22-1 | 5,000 | b |
| Methyl hydrazine [Hydrazine, methyl-] | 60-34-4 | 15,000 | b |
| Methyl isocyanate [Methane, isocyanato-] | 624-83-9 | 10,000 | a, b |
| Methyl mercaptan [Methanethiol] | 74-93-1 | 10,000 | b |
| Methyl thiocyanate [Thiocyanic acid, methyl ester] | 556-64-9 | 20,000 | b |
| Methyltrichlorosilane [Silane, trichloromethyl-] | 75-79-6 | 5,000 | b |
| Nickel carbonyl | 13463-39-3 | 1,000 | b |
| Nitric acid (conc 80% or greater) | 7697-37-2 | 15,000 | b |
| Nitric oxide [Nitrogen oxide (NO)] | 10102-43-9 | 10,000 | b |
| Oleum (Fuming Sulfuric acid) [Sulfuric acid, mixture with sulfur trioxide]1 | 8014-95-7 | 10,000 | e |
| Peracetic acid [Ethaneperoxoic acid] | 79-21-0 | 10,000 | b |
| Perchloromethylmercaptan [Methanesulfenyl chloride, trichloro-] | 594-42-3 | 10,000 | b |
| Phosgene [Carbonic dichloride] | 75-44-5 | 500 | a, b |
| Phosphine | 7803-51-2 | 5,000 | b |
| Phosphorus oxychloride [Phosphoryl chloride] | 10025-87-3 | 5,000 | b |
| Phosphorus trichloride [Phosphorous trichloride] | 7719-12-2 | 15,000 | b |
| Piperidine | 110-89-4 | 15,000 | b |
| Propionitrile [Propanenitrile] | 107-12-0 | 10,000 | b |
| Propyl chloroformate [Carbonochloridic acid, propylester] | 109-61-5 | 15,000 | b |
| Propyleneimine [Aziridine, 2-methyl-] | 75-55-8 | 10,000 | b |
| Propylene oxide [Oxirane, methyl-] | 75-56-9 | 10,000 | b |
| Sulfur dioxide (anhydrous) | 7446-09-5 | 5,000 | a, b |
| Sulfur tetrafluoride [Sulfur fluoride (SF4), (T-4)-] | 7783-60-0 | 2,500 | b |
| Sulfur trioxide | 7446-11-9 | 10,000 | a, b |
| Tetramethyllead [Plumbane, tetramethyl-] | 75-74-1 | 10,000 | b |
| Tetranitromethane [Methane, tetranitro-] | 509-14-8 | 10,000 | b |
| Titanium tetrachloride [Titanium chloride (TiCl4) (T-4)-] | 7550-45-0 | 2,500 | b |
| Toluene 2,4-diisocyanate [Benzene, 2,4-diisocyanato-1-methyl-]1 | 584-84-9 | 10,000 | a |
| Toluene 2,6-diisocyanate [Benzene, 1,3-diisocyanato-2-methyl-]1 | 91-08-7 | 10,000 | a |
| Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-]1 | 26471-62-5 | 10,000 | a |
| Trimethylchlorosilane [Silane, chlorotrimethyl-] | 75-77-4 | 10,000 | b |
| Vinyl acetate monomer [Acetic acid ethenyl ester] | 108-05-4 | 15,000 | b |
1 The mixture exemption in § 68.115(b)(1) does not apply to the substance.
NOTE: Basis for Listing:
a Mandated for listing by Congress.
b On EHS list, vapor pressure 10 mmHg or greater.
c Toxic gas.
d Toxicity of hydrogen chloride, potential to release hydrogen chloride, and history of accidents.
e Toxicity of sulfur trioxide and sulfuric acid, potential to release sulfur trioxide, and history of accidents.
Table 2 to § 68.130 -List of Regulated Toxic Substances and Threshold Quantities for Accidental Release Prevention
[CAS Number Order-77 Substances]
| CAS No. | Chemical name | Threshold quantity (lbs) | Basis for listing |
| 50-00-0 | Formaldehyde (solution) | 15,000 | b |
| 57-14-7 | 1,1-Dimethylhydrazine [Hydrazine, 1,1-dimethyl-] | 15,000 | b |
| 60-34-4 | Methyl hydrazine [Hydrazine, methyl-] | 15,000 | b |
| 67-66-3 | Chloroform [Methane, trichloro-] | 20,000 | b |
| 74-87-3 | Methyl chloride [Methane, chloro-] | 10,000 | a |
| 74-90-8 | Hydrocyanic acid | 2,500 | a, b |
| 74-93-1 | Methyl mercaptan [Methanethiol] | 10,000 | b |
| 75-15-0 | Carbon disulfide | 20,000 | b |
| 75-21-8 | Ethylene oxide [Oxirane] | 10,000 | a, b |
| 75-44-5 | Phosgene [Carbonic dichloride] | 500 | a, b |
| 75-55-8 | Propyleneimine [Aziridine, 2-methyl-] | 10,000 | b |
| 75-56-9 | Propylene oxide [Oxirane, methyl-] | 10,000 | b |
| 75-74-1 | Tetramethyllead [Plumbane, tetramethyl-] | 10,000 | b |
| 75-77-4 | Trimethylchlorosilane [Silane, chlorotrimethyl-] | 10,000 | b |
| 75-78-5 | Dimethyldichlorosilane [Silane, dichlorodimethyl-] | 5,000 | b |
| 75-79-6 | Methyltrichlorosilane [Silane, trichloromethyl-] | 5,000 | b |
| 78-82-0 | Isobutyronitrile [Propanenitrile, 2-methyl-] | 20,000 | b |
| 79-21-0 | Peracetic acid [Ethaneperoxoic acid] | 10,000 | b |
| 79-22-1 | Methyl chloroformate [Carbonochloridic acid, methylester] | 5,000 | b |
| 91-08-7 | Toluene 2,6-diisocyanate [Benzene, 1,3-diisocyanato-2-methyl-]1 | 10,000 | a |
| 106-89-8 | Epichlorohydrin [Oxirane, (chloromethyl)-] | 20,000 | b |
| 107-02-8 | Acrolein [2-Propenal] | 5,000 | b |
| 107-11-9 | Allylamine [2-Propen-1-amine] | 10,000 | b |
| 107-12-0 | Propionitrile [Propanenitrile] | 10,000 | b |
| 107-13-1 | Acrylonitrile [2-Propenenitrile] | 20,000 | b |
| 107-15-3 | Ethylenediamine [1,2-Ethanediamine] | 20,000 | b |
| 107-18-6 | Allyl alcohol [2-Propen-1-ol] | 15,000 | b |
| 107-30-2 | Chloromethyl methyl ether [Methane, chloromethoxy-] | 5,000 | b |
| 108-05-4 | Vinyl acetate monomer [Acetic acid ethenyl ester] | 15,000 | b |
| 108-23-6 | Isopropyl chloroformate [Carbonochloridic acid, 1-methylethyl ester] | 15,000 | b |
| 108-91-8 | Cyclohexylamine [Cyclohexanamine] | 15,000 | b |
| 109-61-5 | Propyl chloroformate [Carbonochloridic acid, propylester] | 15,000 | b |
| 110-00-9 | Furan | 5,000 | b |
| 110-89-4 | Piperidine | 15,000 | b |
| 123-73-9 | Crotonaldehyde, (E)- [2-Butenal, (E)-] | 20,000 | b |
| 126-98-7 | Methacrylonitrile [2-Propenenitrile, 2-methyl-] | 10,000 | b |
| 151-56-4 | Ethyleneimine [Aziridine] | 10,000 | b |
| 302-01-2 | Hydrazine | 15,000 | b |
| 353-42-4 | Boron trifluoride compound with methyl ether (1:1) [Boron, trifluoro[oxybis[methane]]-, T-4- | 15,000 | b |
| 506-77-4 | Cyanogen chloride | 10,000 | c |
| 509-14-8 | Tetranitromethane [Methane, tetranitro-] | 10,000 | b |
| 542-88-1 | Chloromethyl ether [Methane, oxybis[chloro-] | 1,000 | b |
| 556-64-9 | Methyl thiocyanate [Thiocyanic acid, methyl ester] | 20,000 | b |
| 584-84-9 | Toluene 2,4-diisocyanate [Benzene, 2,4-diisocyanato-1-methyl-]1 | 10,000 | a |
| 594-42-3 | Perchloromethylmercaptan [Methanesulfenyl chloride, trichloro-] | 10,000 | b |
| 624-83-9 | Methyl isocyanate [Methane, isocyanato-] | 10,000 | a, b |
| 814-68-6 | Acrylyl chloride [2-Propenoyl chloride] | 5,000 | b |
| 4170-30-3 | Crotonaldehyde [2-Butenal] | 20,000 | b |
| 7446-09-5 | Sulfur dioxide (anhydrous) | 5,000 | a, b |
| 7446-11-9 | Sulfur trioxide | 10,000 | a, b |
| 7550-45-0 | Titanium tetrachloride [Titanium chloride (TiCl4) (T-4)-] | 2,500 | b |
| 7637-07-2 | Boron trifluoride [Borane, trifluoro-] | 5,000 | b |
| 7647-01-0 | Hydrochloric acid (conc 37% or greater) | 15,000 | d |
| 7647-01-0 | Hydrogen chloride (anhydrous) [Hydrochloric acid] | 5,000 | a |
| 7664-39-3 | Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid] | 1,000 | a, b |
| 7664-41-7 | Ammonia (anhydrous) | 10,000 | a, b |
| 7664-41-7 | Ammonia (conc 20% or greater) | 20,000 | a, b |
| 7697-37-2 | Nitric acid (conc 80% or greater) | 15,000 | b |
| 7719-12-2 | Phosphorus trichloride [Phosphorous trichloride] | 15,000 | b |
| 7726-95-6 | Bromine | 10,000 | a, b |
| 7782-41-4 | Fluorine | 1,000 | b |
| 7782-50-5 | Chlorine | 2,500 | a, b |
| 7783-06-4 | Hydrogen sulfide | 10,000 | a, b |
| 7783-07-5 | Hydrogen selenide | 500 | b |
| 7783-60-0 | Sulfur tetrafluoride [Sulfur fluoride (SF4), (T-4)-] | 2,500 | b |
| 7784-34-1 | Arsenous trichloride | 15,000 | b |
| 7784-42-1 | Arsine | 1,000 | b |
| 7803-51-2 | Phosphine | 5,000 | b |
| 8014-95-7 | Oleum (Fuming Sulfuric acid) [Sulfuric acid, mixture with sulfur trioxide]1 | 10,000 | e |
| 10025-87-3 | Phosphorus oxychloride [Phosphoryl chloride] | 5,000 | b |
| 10049-04-4 | Chlorine dioxide [Chlorine oxide (ClO2)] | 1,000 | c |
| 10102-43-9 | Nitric oxide [Nitrogen oxide (NO)] | 10,000 | b |
| 10294-34-5 | Boron trichloride [Borane, trichloro-] | 5,000 | b |
| 13463-39-3 | Nickel carbonyl | 1,000 | b |
| 13463-40-6 | Iron, pentacarbonyl- [Iron carbonyl (Fe(CO)5), (TB-5-11)-] | 2,500 | b |
| 19287-45-7 | Diborane | 2,500 | b |
| 26471-62-5 | Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-1]1 | 10,000 | a |
1 The mixture exemption in § 68.115(b)(1) does not apply to the substance.
NOTE: Basis for Listing:
a Mandated for listing by Congress.
b On EHS list, vapor pressure 10 mmHg or greater.
c Toxic gas.
d Toxicity of hydrogen chloride, potential to release hydrogen chloride, and history of accidents.
e Toxicity of sulfur trioxide and sulfuric acid, potential to release sulfur trioxide, and history of accidents.
Table 3 to § 68.130 -List of Regulated Flammable Substances1 and Threshold Quantities for Accidental Release Prevention
[Alphabetical Order-63 Substances]
| Chemical name | CAS No. | Threshold quantity (lbs) | Basis for listing |
| Acetaldehyde | 75-07-0 | 10,000 | g |
| Acetylene [Ethyne] | 74-86-2 | 10,000 | f |
| Bromotrifluorethylene [Ethene, bromotrifluoro-] | 598-73-2 | 10,000 | f |
| 1,3-Butadiene | 106-99-0 | 10,000 | f |
| Butane | 106-97-8 | 10,000 | f |
| 1-Butene | 106-98-9 | 10,000 | f |
| 2-Butene | 107-01-7 | 10,000 | f |
| Butene | 25167-67-3 | 10,000 | f |
| 2-Butene-cis | 590-18-1 | 10,000 | f |
| 2-Butene-trans [2-Butene, (E)] | 624-64-6 | 10,000 | f |
| Carbon oxysulfide [Carbon oxide sulfide (COS)] | 463-58-1 | 10,000 | f |
| Chlorine monoxide [Chlorine oxide] | 7791-21-1 | 10,000 | f |
| 2-Chloropropylene [1-Propene, 2-chloro-] | 557-98-2 | 10,000 | g |
| 1-Chloropropylene [1-Propene, 1-chloro-] | 590-21-6 | 10,000 | g |
| Cyanogen [Ethanedinitrile] | 460-19-5 | 10,000 | f |
| Cyclopropane | 75-19-4 | 10,000 | f |
| Dichlorosilane [Silane, dichloro-] | 4109-96-0 | 10,000 | f |
| Difluoroethane [Ethane, 1,1-difluoro-] | 75-37-6 | 10,000 | f |
| Dimethylamine [Methanamine, N-methyl-] | 124-40-3 | 10,000 | f |
| 2,2-Dimethylpropane [Propane, 2,2-dimethyl-] | 463-82-1 | 10,000 | f |
| Ethane | 74-84-0 | 10,000 | f |
| Ethyl acetylene [1-Butyne] | 107-00-6 | 10,000 | f |
| Ethylamine [Ethanamine] | 75-04-7 | 10,000 | f |
| Ethyl chloride [Ethane, chloro-] | 75-00-3 | 10,000 | f |
| Ethylene [Ethene] | 74-85-1 | 10,000 | f |
| Ethyl ether [Ethane, 1,1'-oxybis-] | 60-29-7 | 10,000 | g |
| Ethyl mercaptan [Ethanethiol] | 75-08-1 | 10,000 | g |
| Ethyl nitrite [Nitrous acid, ethyl ester] | 109-95-5 | 10,000 | f |
| Hydrogen | 1333-74-0 | 10,000 | f |
| Isobutane [Propane, 2-methyl] | 75-28-5 | 10,000 | f |
| Isopentane [Butane, 2-methyl-] | 78-78-4 | 10,000 | g |
| Isoprene [1,3-Butadinene, 2-methyl-] | 78-79-5 | 10,000 | g |
| Isopropylamine [2-Propanamine] | 75-31-0 | 10,000 | g |
| Isopropyl chloride [Propane, 2-chloro-] | 75-29-6 | 10,000 | g |
| Methane | 74-82-8 | 10,000 | f |
| Methylamine [Methanamine] | 74-89-5 | 10,000 | f |
| 3-Methyl-1-butene | 563-45-1 | 10,000 | f |
| 2-Methyl-1-butene | 563-46-2 | 10,000 | g |
| Methyl ether [Methane, oxybis-] | 115-10-6 | 10,000 | f |
| Methyl formate [Formic acid, methyl ester] | 107-31-3 | 10,000 | g |
| 2-Methylpropene [1-Propene, 2-methyl-] | 115-11-7 | 10,000 | f |
| 1,3-Pentadinene | 504-60-9 | 10,000 | f |
| Pentane | 109-66-0 | 10,000 | g |
| 1-Pentene | 109-67-1 | 10,000 | g |
| 2-Pentene, (E)- | 646-04-8 | 10,000 | g |
| 2-Pentene, (Z)- | 627-20-3 | 10,000 | g |
| Propadiene [1,2-Propadiene] | 463-49-0 | 10,000 | f |
| Propane | 74-98-6 | 10,000 | f |
| Propylene [1-Propene] | 115-07-1 | 10,000 | f |
| Propyne [1-Propyne] | 74-99-7 | 10,000 | f |
| Silane | 7803-62-5 | 10,000 | f |
| Tetrafluoroethylene [Ethene, tetrafluoro-] | 116-14-3 | 10,000 | f |
| Tetramethylsilane [Silane, tetramethyl-] | 75-76-3 | 10,000 | g |
| Trichlorosilane [Silane, trichloro-] | 10025-78-2 | 10,000 | g |
| Trifluorochloroethylene [Ethene, chlorotrifluoro-] | 79-38-9 | 10,000 | f |
| Trimethylamine [Methanamine, N,N-dimethyl-] | 75-50-3 | 10,000 | f |
| Vinyl acetylene [1-Buten-3-yne] | 689-97-4 | 10,000 | f |
| Vinyl chloride [Ethene, chloro-] | 75-01-4 | 10,000 | a, f |
| Vinyl ethyl ether [Ethene, ethoxy-] | 109-92-2 | 10,000 | g |
| Vinyl fluoride [Ethene, fluoro-] | 75-02-5 | 10,000 | f |
| Vinylidene chloride [Ethene, 1,1-dichloro-] | 75-35-4 | 10,000 | g |
| Vinylidene fluoride [Ethene, 1,1-difluoro-] | 75-38-7 | 10,000 | f |
| Vinyl methyl ether [Ethene, methoxy-] | 107-25-5 | 10,000 | f |
1 A flammable substance when used as a fuel or held for sale as a fuel at a retail facility is excluded from all provisions of this part (see § 68.126 ).
NOTE: Basis for Listing:
a Mandated for listing by Congress.
f Flammable gas.
g Volatile flammable liquid.
Table 4 to § 68.130 -List of Regulated Flammable Substances1 and Threshold Quantities for Accidental Release Prevention
[CAS Number Order-63 Substances]
| CAS No. | Chemical name | Threshold quantity (lbs) | Basis for listing |
| 60-29-7 | Ethyl ether [Ethane, 1,1'-oxybis-] | 10,000 | g |
| 74-82-8 | Methane | 10,000 | f |
| 74-84-0 | Ethane | 10,000 | f |
| 74-85-1 | Ethylene [Ethene] | 10,000 | f |
| 74-86-2 | Acetylene [Ethyne] | 10,000 | f |
| 74-89-5 | Methylamine [Methanamine] | 10,000 | f |
| 74-98-6 | Propane | 10,000 | f |
| 74-99-7 | Propyne [1-Propyne] | 10,000 | f |
| 75-00-3 | Ethyl chloride [Ethane, chloro-] | 10,000 | f |
| 75-01-4 | Vinyl chloride [Ethene, chloro-] | 10,000 | a, f |
| 75-02-5 | Vinyl fluoride [Ethene, fluoro-] | 10,000 | f |
| 75-04-7 | Ethylamine [Ethanamine] | 10,000 | f |
| 75-07-0 | Acetaldehyde | 10,000 | g |
| 75-08-1 | Ethyl mercaptan [Ethanethiol] | 10,000 | g |
| 75-19-4 | Cyclopropane | 10,000 | f |
| 75-28-5 | Isobutane [Propane, 2-methyl] | 10,000 | f |
| 75-29-6 | Isopropyl chloride [Propane, 2-chloro-] | 10,000 | g |
| 75-31-0 | Isopropylamine [2-Propanamine] | 10,000 | g |
| 75-35-4 | Vinylidene chloride [Ethene, 1,1-dichloro-] | 10,000 | g |
| 75-37-6 | Difluoroethane [Ethane, 1,1-difluoro-] | 10,000 | f |
| 75-38-7 | Vinylidene fluoride [Ethene, 1,1-difluoro-] | 10,000 | f |
| 75-50-3 | Trimethylamine [Methanamine, N, N-dimethyl-] | 10,000 | f |
| 75-76-3 | Tetramethylsilane [Silane, tetramethyl-] | 10,000 | g |
| 78-78-4 | Isopentane [Butane, 2-methyl-] | 10,000 | g |
| 78-79-5 | Isoprene [1,3,-Butadiene, 2-methyl-] | 10,000 | g |
| 79-38-9 | Trifluorochloroethylene [Ethene, chlorotrifluoro-] | 10,000 | f |
| 106-97-8 | Butane | 10,000 | f |
| 106-98-9 | 1-Butene | 10,000 | f |
| 106-99-0 | 1,3-Butadiene | 10,000 | f |
| 107-00-6 | Ethyl acetylene [1-Butyne] | 10,000 | f |
| 107-01-7 | 2-Butene | 10,000 | f |
| 107-25-5 | Vinyl methyl ether [Ethene, methoxy-] | 10,000 | f |
| 107-31-3 | Methyl formate [Formic acid, methyl ester] | 10,000 | g |
| 109-66-0 | Pentane | 10,000 | g |
| 109-67-1 | 1-Pentene | 10,000 | g |
| 109-92-2 | Vinyl ethyl ether [Ethene, ethoxy-] | 10,000 | g |
| 109-95-5 | Ethyl nitrite [Nitrous acid, ethyl ester] | 10,000 | f |
| 115-07-1 | Propylene [1-Propene] | 10,000 | f |
| 115-10-6 | Methyl ether [Methane, oxybis-] | 10,000 | f |
| 115-11-7 | 2-Methylpropene [1-Propene, 2-methyl-] | 10,000 | f |
| 116-14-3 | Tetrafluoroethylene [Ethene, tetrafluoro-] | 10,000 | f |
| 124-40-3 | Dimethylamine [Methanamine, N-methyl-] | 10,000 | f |
| 460-19-5 | Cyanogen [Ethanedinitrile] | 10,000 | f |
| 463-49-0 | Propadiene [1,2-Propadiene] | 10,000 | f |
| 463-58-1 | Carbon oxysulfide [Carbon oxide sulfide (COS)] | 10,000 | f |
| 463-82-1 | 2,2-Dimethylpropane [Propane, 2,2-dimethyl-] | 10,000 | f |
| 504-60-9 | 1,3-Pentadiene | 10,000 | f |
| 557-98-2 | 2-Chloropropylene [1-Propene, 2-chloro-] | 10,000 | g |
| 563-45-1 | 3-Methyl-1-butene | 10,000 | f |
| 563-46-2 | 2-Methyl-1-butene | 10,000 | g |
| 590-18-1 | 2-Butene-cis | 10,000 | f |
| 590-21-6 | 1-Chloropropylene [1-Propene, 1-chloro-] | 10,000 | g |
| 598-73-2 | Bromotrifluorethylene [Ethene, bromotrifluoro-] | 10,000 | f |
| 624-64-6 | 2-Butene-trans [2-Butene, (E)] | 10,000 | f |
| 627-20-3 | 2-Pentene, (Z)- | 10,000 | g |
| 646-04-8 | 2-Pentene, (E)- | 10,000 | g |
| 689-97-4 | Vinyl acetylene [1-Buten-3-yne] | 10,000 | f |
| 1333-74-0 | Hydrogen | 10,000 | f |
| 4109-96-0 | Dichlorosilane [Silane, dichloro-] | 10,000 | f |
| 7791-21-1 | Chlorine monoxide [Chlorine oxide] | 10,000 | f |
| 7803-62-5 | Silane | 10,000 | f |
| 10025-78-2 | Trichlorosilane [Silane, trichloro-] | 10,000 | g |
| 25167-67-3 | Butene | 10,000 | f |
1 A flammable substance when used as a fuel or held for sale as a fuel at a retail facility is excluded from all provisions of this part (see § 68.126 ).
Note: Basis for Listing:
a Mandated for listing by Congress.
f Flammable gas.
g Volatile flammable liquid.
40 C.F.R. §68.130