[Code of Federal Regulations] [Title 40, Volume 14] [Revised as of July 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR68.130] [Page 178-184] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 68_CHEMICAL ACCIDENT PREVENTION PROVISIONS--Table of Contents Subpart F_Regulated Substances for Accidental Release Prevention Sec. 68.130 List of substances. (a) Regulated toxic and flammable substances under section 112(r) of the Clean Air Act are the substances listed in Tables 1, 2, 3, and 4. Threshold quantities for listed toxic and flammable substances are specified in the tables. (b) The basis for placing toxic and flammable substances on the list of regulated substances are explained in the notes to the list. Table 1 to Sec. 68.130--List of Regulated Toxic Substances and Threshold Quantities for Accidental Release Prevention [Alphabetical Order--77 Substances] ------------------------------------------------------------------------ Threshold Chemical name CAS No. quantity Basis for (lbs) listing ------------------------------------------------------------------------ Acrolein [2-Propenal].......... 107-02-8 5,000 b Acrylonitrile [2- 107-13-1 20,000 b Propenenitrile]. Acrylyl chloride [2-Propenoyl 814-68-6 5,000 b chloride]. Allyl alcohol [2-Propen-l-ol].. 107-18-61 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, 10294-34-5 5,000 b trichloro-]. Boron trifluoride [Borane, 7637-07-2 5,000 b trifluoro-]. Boron trifluoride compound with 353-42-4 15,000 b methyl ether (1:1) [Boron, trifluoro [oxybis [metane]]-, T-4-. 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 10049-04-4 1,000 c oxide (ClO2)]. Chloroform [Methane, trichloro- 67-66-3 20,000 b ]. Chloromethyl ether [Methane, 542-88-1 1,000 b oxybis[chloro-]. Chloromethyl methyl ether 107-30-2 5,000 b [Methane, chloromethoxy-]. Crotonaldehyde [2-Butenal]..... 4170-30-3 20,000 b [[Page 179]] Crotonaldehyde, (E)- [2- 123-73-9 20,000 b Butenal, (E)-]. Cyanogen chloride.............. 506-77-4 10,000 c Cyclohexylamine 108-91-8 15,000 b [Cyclohexanamine]. Diborane....................... 19287-45-7 2,500 b Dimethyldichlorosilane [Silane, 75-78-5 5,000 b dichlorodimethyl-]. 1,1-Dimethylhydrazine 57-14-7 15,000 b [Hydrazine, 1,1-dimethyl-]. Epichlorohydrin [Oxirane, 106-89-8 20,000 b (chloromethyl)-]. Ethylenediamine [1,2- 107-15-3 20,000 b Ethanediamine]. 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 7647-01-0 15,000 d greater). Hydrocyanic acid............... 74-90-8 2,500 a, b Hydrogen chloride (anhydrous) 7647-01-0 5,000 a [Hydrochloric acid]. Hydrogen fluoride/Hydrofluoric 7664-39-3 1,000 a, b acid (conc 50% or greater) [Hydrofluoric acid]. Hydrogen selenide.............. 7783-07-5 500 b Hydrogen sulfide............... 7783-06-4 10,000 a, b Iron, pentacarbonyl- [Iron 13463-40-6 2,500 b carbonyl (Fe(CO)5), (TB-5-11)- ]. Isobutyronitrile 78-82-0 20,000 b [Propanenitrile, 2-methyl-]. Isopropyl chloroformate 108-23-6 15,000 b [Carbonochloridic acid, 1- methylethyl ester]. Methacrylonitrile [2- 126-98-7 10,000 b Propenenitrile, 2-methyl-]. Methyl chloride [Methane, 74-87-3 10,000 a chloro-]. Methyl chloroformate 79-22-1 5,000 b [Carbonochloridic acid, methylester]. Methyl hydrazine [Hydrazine, 60-34-4 15,000 b methyl-]. Methyl isocyanate [Methane, 624-83-9 10,000 a, b isocyanato-]. Methyl mercaptan [Methanethiol] 74-93-1 10,000 b Methyl thiocyanate [Thiocyanic 556-64-9 20,000 b acid, methyl ester]. Methyltrichlorosilane [Silane, 75-79-6 5,000 b trichloromethyl-]. Nickel carbonyl................ 13463-39-3 1,000 b Nitric acid (conc 80% or 7697-37-2 15,000 b greater). Nitric oxide [Nitrogen oxide 10102-43-9 10,000 b (NO)]. Oleum (Fuming Sulfuric acid) 8014-95-7 10,000 e [Sulfuric acid, mixture with sulfur trioxide] \1\. Peracetic acid [Ethaneperoxoic 79-21-0 10,000 b acid]. Perchloromethylmercaptan 594-42-3 10,000 b [Methanesulfenyl chloride, trichloro-]. Phosgene [Carbonic dichloride]. 75-44-5 500 a, b Phosphine...................... 7803-51-2 5,000 b Phosphorus oxychloride 10025-87-3 5,000 b [Phosphoryl chloride]. Phosphorus trichloride 7719-12-2 15,000 b [Phosphorous trichloride]. Piperidine..................... 110-89-4 15,000 b Propionitrile [Propanenitrile]. 107-12-0 10,000 b [[Page 180]] Propyl chloroformate 109-61-5 15,000 b [Carbonochloridic acid, propylester]. Propyleneimine [Aziridine, 2- 75-55-8 10,000 b methyl-]. Propylene oxide [Oxirane, 75-56-9 10,000 b methyl-]. Sulfur dioxide (anhydrous)..... 7446-09-5 5,000 a, b Sulfur tetrafluoride [Sulfur 7783-60-0 2,500 b fluoride (SF4), (T-4)-]. Sulfur trioxide................ 7446-11-9 10,000 a, b Tetramethyllead [Plumbane, 75-74-1 10,000 b tetramethyl-]. Tetranitromethane [Methane, 509-14-8 10,000 b tetranitro-]. Titanium tetrachloride 7550-45-0 2,500 b [Titanium chloride (TiCl4) (T- 4)-]. Toluene 2,4-diisocyanate 584-84-9 10,000 a [Benzene, 2,4-diisocyanato-1- methyl-] \1\. Toluene 2,6-diisocyanate 91-08-7 10,000 a [Benzene, 1,3-diisocyanato-2- methyl-] \1\. Toluene diisocyanate 26471-62-5 10,000 a (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-] \1\. Trimethylchlorosilane [Silane, 75-77-4 10,000 b chlorotrimethyl-]. Vinyl acetate monomer [Acetic 108-05-4 15,000 b acid ethenyl ester]. ------------------------------------------------------------------------ \1\ The mixture exemption in Sec. 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 Sec. 68.130--List of Regulated Toxic Substances and Threshold Quantities for Accidental Release Prevention [CAS Number Order--77 Substances] ------------------------------------------------------------------------ Threshold CAS No. Chemical name quantity Basis for (lbs) listing ------------------------------------------------------------------------ 50-00-0................ Formaldehyde 15,000 b (solution). 57-14-7................ 1,1-Dimethylhydrazine 15,000 b [Hydrazine, 1,1- dimethyl-]. 60-34-4................ Methyl hydrazine 15,000 b [Hydrazine, methyl-]. 67-66-3................ Chloroform [Methane, 20,000 b trichloro-]. 74-87-3................ Methyl chloride 10,000 a [Methane, chloro-]. 74-90-8................ Hydrocyanic acid...... 2,500 a, b 74-93-1................ Methyl mercaptan 10,000 b [Methanethiol]. 75-15-0................ Carbon disulfide...... 20,000 b 75-21-8................ Ethylene oxide 10,000 a, b [Oxirane]. 75-44-5................ Phosgene [Carbonic 500 a, b dichloride]. 75-55-8................ Propyleneimine 10,000 b [Aziridine, 2-methyl- ]. 75-56-9................ Propylene oxide 10,000 b [Oxirane, methyl-]. 75-74-1................ Tetramethyllead 10,000 b [Plumbane, tetramethyl-]. 75-77-4................ Trimethylchlorosilane 10,000 b [Silane, chlorotrimethyl-]. 75-78-5................ Dimethyldichlorosilane 5,000 b [Silane, dichlorodimethyl-]. 75-79-6................ Methyltrichlorosilane 5,000 b [Silane, trichloromethyl-]. 78-82-0................ Isobutyronitrile 20,000 b [Propanenitrile, 2- methyl-]. 79-21-0................ Peracetic acid 10,000 b [Ethaneperoxoic acid]. 79-22-1................ Methyl chloroformate 5,000 b [Carbonochloridic acid, methylester]. 91-08-7................ Toluene 2,6- 10,000 a diisocyanate [Benzene, 1,3- diisocyanato-2-methyl- ]\1\. 106-89-8............... Epichlorohydrin 20,000 b [Oxirane, (chloromethyl)-]. 107-02-8............... Acrolein [2-Propenal]. 5,000 b 107-11-9............... Allylamine [2-Propen-1- 10,000 b amine]. [[Page 181]] 107-12-0............... Propionitrile 10,000 b [Propanenitrile]. 107-13-1............... Acrylonitrile [2- 20,000 b Propenenitrile]. 107-15-3............... Ethylenediamine [1,2- 20,000 b Ethanediamine]. 107-18-6............... Allyl alcohol [2- 15,000 b Propen-1-ol]. 107-30-2............... Chloromethyl methyl 5,000 b ether [Methane, chloromethoxy-]. 108-05-4............... Vinyl acetate monomer 15,000 b [Acetic acid ethenyl ester]. 108-23-6............... Isopropyl 15,000 b chloroformate [Carbonochloridic acid, 1-methylethyl ester]. 108-91-8............... Cyclohexylamine 15,000 b [Cyclohexanamine]. 109-61-5............... Propyl chloroformate 15,000 b [Carbonochloridic acid, propylester]. 110-00-9............... Furan................. 5,000 b 110-89-4............... Piperidine............ 15,000 b 123-73-9............... Crotonaldehyde, (E)- 20,000 b [2-Butenal, (E)-]. 126-98-7............... Methacrylonitrile [2- 10,000 b Propenenitrile, 2- methyl-]. 151-56-4............... Ethyleneimine 10,000 b [Aziridine]. 302-01-2............... Hydrazine............. 15,000 b 353-42-4............... Boron trifluoride 15,000 b compound with methyl ether (1:1) [Boron, trifluoro[oxybis[meth ane]]-, T-4-. 506-77-4............... Cyanogen chloride..... 10,000 c 509-14-8............... Tetranitromethane 10,000 b [Methane, tetranitro- ]. 542-88-1............... Chloromethyl ether 1,000 b [Methane, oxybis[chloro-]. 556-64-9............... Methyl thiocyanate 20,000 b [Thiocyanic acid, methyl ester]. 584-84-9............... Toluene 2,4- 10,000 a diisocyanate [Benzene, 2,4- diisocyanato-1-methyl- ]\1\. 594-42-3............... Perchloromethylmercapt 10,000 b an [Methanesulfenyl chloride, trichloro-]. 624-83-9............... Methyl isocyanate 10,000 a, b [Methane, isocyanato- ]. 814-68-6............... Acrylyl chloride [2- 5,000 b Propenoyl chloride]. 4170-30-3.............. Crotonaldehyde [2- 20,000 b Butenal]. 7446-09-5.............. Sulfur dioxide 5,000 a, b (anhydrous). 7446-11-9.............. Sulfur trioxide....... 10,000 a, b 7550-45-0.............. Titanium tetrachloride 2,500 b [Titanium chloride (TiCl4) (T-4)-]. 7637-07-2.............. Boron trifluoride 5,000 b [Borane, trifluoro-]. 7647-01-0.............. Hydrochloric acid 15,000 d (conc 37% or greater). 7647-01-0.............. Hydrogen chloride 5,000 a (anhydrous) [Hydrochloric acid]. 7664-39-3.............. Hydrogen fluoride/ 1,000 a, b Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid]. 7664-41-7.............. Ammonia (anhydrous)... 10,000 a, b 7664-41-7.............. Ammonia (conc 20% or 20,000 a, b greater). 7697-37-2.............. Nitric acid (conc 80% 15,000 b or greater). 7719-12-2.............. Phosphorus trichloride 15,000 b [Phosphorous trichloride]. 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 2,500 b [Sulfur fluoride (SF4), (T-4)-]. 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 10,000 e acid) [Sulfuric acid, mixture with sulfur trioxide]\1\. 10025-87-3............. Phosphorus oxychloride 5,000 b [Phosphoryl chloride]. 10049-04-4............. Chlorine dioxide 1,000 c [Chlorine oxide (ClO2)]. 10102-43-9............. Nitric oxide [Nitrogen 10,000 b oxide (NO)]. 10294-34-5............. Boron trichloride 5,000 b [Borane, trichloro-]. 13463-39-3............. Nickel carbonyl....... 1,000 b 13463-40-6............. Iron, pentacarbonyl- 2,500 b [Iron carbonyl (Fe(CO)5), (TB-5-11)- ]. 19287-45-7............. Diborane.............. 2,500 b 26471-62-5............. Toluene diisocyanate 10,000 a (unspecified isomer) [Benzene, 1,3- diisocyanatomethyl- 1]\1\. ------------------------------------------------------------------------ \1\ The mixture exemption in Sec. 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. [[Page 182]] Table 3 to Sec. 68.130--List of Regulated Flammable Substances \1\ and Threshold Quantities for Accidental Release Prevention [Alphabetical Order--63 Substances] ------------------------------------------------------------------------ Threshold Chemical name CAS No. quantity Basis for (lbs) listing ------------------------------------------------------------------------ Acetaldehyde................... 75-07-0 10,000 g Acetylene [Ethyne]............. 74-86-2 10,000 f Bromotrifluorethylene [Ethene, 598-73-2 10,000 f bromotrifluoro-]. 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 463-58-1 10,000 f sulfide (COS)]. Chlorine monoxide [Chlorine 7791-21-1 10,000 f oxide]. 2-Chloropropylene [1-Propene, 2- 557-98-2 10,000 g chloro-]. 1-Chloropropylene [1-Propene, 1- 590-21-6 10,000 g chloro-]. Cyanogen [Ethanedinitrile]..... 460-19-5 10,000 f Cyclopropane................... 75-19-4 10,000 f Dichlorosilane [Silane, 4109-96-0 10,000 f dichloro-]. Difluoroethane [Ethane, 1,1- 75-37-6 10,000 f difluoro-]. Dimethylamine [Methanamine, N- 124-40-3 10,000 f methyl-]. 2,2-Dimethylpropane [Propane, 463-82-1 10,000 f 2,2-dimethyl-]. 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'- 60-29-7 10,000 g oxybis-]. Ethyl mercaptan [Ethanethiol].. 75-08-1 10,000 g Ethyl nitrite [Nitrous acid, 109-95-5 10,000 f ethyl ester]. 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- 78-79-5 10,000 g methyl-]. Isopropylamine [2-Propanamine]. 75-31-0 10,000 g Isopropyl chloride [Propane, 2- 75-29-6 10,000 g chloro-]. 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, 107-31-3 10,000 g methyl ester]. 2-Methylpropene [1-Propene, 2- 115-11-7 10,000 f methyl-]. 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, 116-14-3 10,000 f tetrafluoro-]. Tetramethylsilane [Silane, 75-76-3 10,000 g tetramethyl-]. Trichlorosilane [Silane, 10025-78-2 10,000 g trichloro-]. Trifluorochloroethylene 79-38-9 10,000 f [Ethene, chlorotrifluoro-]. Trimethylamine [Methanamine, 75-50-3 10,000 f N,N-dimethyl-]. 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, 109-92-2 10,000 g ethoxy-]. Vinyl fluoride [Ethene, fluoro- 75-02-5 10,000 f ]. Vinylidene chloride [Ethene, 75-35-4 10,000 g 1,1-dichloro-]. Vinylidene fluoride [Ethene, 75-38-7 10,000 f 1,1-difluoro-]. Vinyl methyl ether [Ethene, 107-25-5 10,000 f methoxy-]. ------------------------------------------------------------------------ \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 Sec. 68.126). Note: Basis for Listing: a Mandated for listing by Congress. [[Page 183]] f Flammable gas. g Volatile flammable liquid. Table 4 to Sec. 68.130--List of Regulated Flammable Substances \1\ and Threshold Quantities for Accidental Release Prevention [CAS Number Order--63 Substances] ---------------------------------------------------------------------------------------------------------------- Threshold CAS No. Chemical name CAS No. quantity Basis for listing (lbs) ---------------------------------------------------------------------------------------------------------------- 60-29-7........................ Ethyl ether [Ethane, 1,1'- 60-29-7 10,000 g oxybis-]. 74-82-8........................ Methane....................... 74-82-8 10,000 f 74-84-0........................ Ethane........................ 74-84-0 10,000 f 74-85-1........................ Ethylene [Ethene]............. 74-85-1 10,000 f 74-86-2........................ Acetylene [Ethyne]............ 74-86-2 10,000 f 74-89-5........................ Methylamine [Methanamine]..... 74-89-5 10,000 f 74-98-6........................ Propane....................... 74-98-6 10,000 f 74-99-7........................ Propyne [1-Propyne]........... 74-99-7 10,000 f 75-00-3........................ Ethyl chloride [Ethane, chloro- 75-00-3 10,000 f ]. 75-01-4........................ Vinyl chloride [Ethene, chloro- 75-01-4 10,000 a, f ]. 75-02-5........................ Vinyl fluoride [Ethene, fluoro- 75-02-5 10,000 f ]. 75-04-7........................ Ethylamine [Ethanamine]....... 75-04-7 10,000 f 75-07-0........................ Acetaldehyde.................. 75-07-0 10,000 g 75-08-1........................ Ethyl mercaptan [Ethanethiol]. 75-08-1 10,000 g 75-19-4........................ Cyclopropane.................. 75-19-4 10,000 f 75-28-5........................ Isobutane [Propane, 2-methyl]. 75-28-5 10,000 f 75-29-6........................ Isopropyl chloride [Propane, 2- 75-29-6 10,000 g chloro-]. 75-31-0........................ Isopropylamine [2-Propanamine] 75-31-0 10,000 g 75-35-4........................ Vinylidene chloride [Ethene, 75-35-4 10,000 g 1,1-dichloro-]. 75-37-6........................ Difluoroethane [Ethane, 1,1- 75-37-6 10,000 f difluoro-]. 75-38-7........................ Vinylidene fluoride [Ethene, 75-38-7 10,000 f 1,1-difluoro-]. 75-50-3........................ Trimethylamine [Methanamine, 75-50-3 10,000 f N, N-dimethyl-]. 75-76-3........................ Tetramethylsilane [Silane, 75-76-3 10,000 g tetramethyl-]. 78-78-4........................ Isopentane [Butane, 2-methyl-] 78-78-4 10,000 g 78-79-5........................ Isoprene [1,3,-Butadiene, 2- 78-79-5 10,000 g methyl-]. 79-38-9........................ Trifluorochloroethylene 79-38-9 10,000 f [Ethene, chlorotrifluoro-]. 106-97-8....................... Butane........................ 106-97-8 10,000 f 106-98-9....................... 1-Butene...................... 106-98-9 10,000 f 196-99-0....................... 1,3-Butadiene................. 106-99-0 10,000 f 107-00-6....................... Ethyl acetylene [1-Butyne].... 107-00-6 10,000 f 107-01-7....................... 2-Butene...................... 107-01-7 10,000 f 107-25-5....................... Vinyl methyl ether [Ethene, 107-25-5 10,000 f methoxy-]. 107-31-3....................... Methyl formate [Formic acid, 107-31-3 10,000 g methyl ester]. 109-66-0....................... Pentane....................... 109-66-0 10,000 g 109-67-1....................... 1-Pentene..................... 109-67-1 10,000 g 109-92-2....................... Vinyl ethyl ether [Ethene, 109-92-2 10,000 g ethoxy-]. 109-95-5....................... Ethyl nitrite [Nitrous acid, 109-95-5 10,000 f ethyl ester]. 115-07-1....................... Propylene [1-Propene]......... 115-07-1 10,000 f 115-10-6....................... Methyl ether [Methane, oxybis- 115-10-6 10,000 f ]. 115-11-7....................... 2-Methylpropene [1-Propene, 2- 115-11-7 10,000 f methyl-]. 116-14-3....................... Tetrafluoroethylene [Ethene, 116-14-3 10,000 f tetrafluoro-]. 124-40-3....................... Dimethylamine [Methanamine, N- 124-40-3 10,000 f methyl-]. 460-19-5....................... Cyanogen [Ethanedinitrile].... 460-19-5 10,000 f 463-49-0....................... Propadiene [1,2-Propadiene]... 463-49-0 10,000 f 463-58-1....................... Carbon oxysulfide [Carbon 463-58-1 10,000 f oxide sulfide (COS)]. 463-82-1....................... 2,2-Dimethylpropane [Propane, 463-82-1 10,000 f 2,2-dimethyl-]. 504-60-9....................... 1,3-Pentadiene................ 504-60-9 10,000 f 557-98-2....................... 2-Chloropropylene [1-Propene, 557-98-2 10,000 g 2-chloro-]. 563-45-1....................... 3-Methyl-1-butene............. 563-45-1 10,000 f 563-46-2....................... 2-Methyl-1-butene............. 563-46-2 10,000 g 590-18-1....................... 2-Butene-cis.................. 590-18-1 10,000 f 590-21-6....................... 1-Chloropropylene [1-Propene, 590-21-6 10,000 g 1-chloro-]. 598-73-2....................... Bromotrifluorethylene [Ethene, 598-73-2 10,000 f bromotrifluoro-]. 624-64-6....................... 2-Butene-trans [2-Butene, (E)] 624-64-6 10,000 f 627-20-3....................... 2-Pentene, (Z)-............... 627-20-3 10,000 g 646-04-8....................... 2-Pentene, (E)-............... 646-04-8 10,000 g 689-97-4....................... Vinyl acetylene [1-Buten-3- 689-97-4 10,000 f yne]. 1333-74-0...................... Hydrogen...................... 1333-74-0 10,000 f 4109-96-0...................... Dichlorosilane [Silane, 4109-96-0 10,000 f dichloro-]. 7791-21-1...................... Chlorine monoxide [Chlorine 7791-21-1 10,000 f oxide]. 7803-62-5...................... Silane........................ 7803-62-5 10,000 f 10025-78-2..................... Trichlorosilane 10025-78-2 10,000 g [Silane,trichloro-]. 25167-67-3..................... Butene........................ 25167-67-3 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 Sec. 68.126). [[Page 184]] Note: Basis for Listing: a Mandated for listing by Congress. f Flammable gas. g Volatile flammable liquid. [59 FR 4493, Jan. 31, 1994. Redesignated at 61 FR 31717, June 20, 1996, as amended at 62 FR 45132, Aug. 25, 1997; 63 FR 645, Jan. 6, 1998; 65 FR 13250, Mar. 13, 2000]