(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 bAcrylonitrile [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 bAllylamine [2-Propen-l-amine].. 107-11-9 10,000 bAmmonia (anhydrous)............ 7664-41-7 10,000 a, bAmmonia (conc 20% or greater).. 7664-41-7 20,000 a, bArsenous trichloride........... 7784-34-1 15,000 bArsine......................... 7784-42-1 1,000 bBoron 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, bCarbon disulfide............... 75-15-0 20,000 bChlorine....................... 7782-50-5 2,500 a, bChlorine 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 bCrotonaldehyde, (E)- [2- 123-73-9 20,000 b
Butenal, (E)-].Cyanogen chloride.............. 506-77-4 10,000 cCyclohexylamine 108-91-8 15,000 b
[Cyclohexanamine].Diborane....................... 19287-45-7 2,500 bDimethyldichlorosilane [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 bEthylene oxide [Oxirane]....... 75-21-8 10,000 a, bFluorine....................... 7782-41-4 1,000 bFormaldehyde (solution)........ 50-00-0 15,000 bFuran.......................... 110-00-9 5,000 bHydrazine...................... 302-01-2 15,000 bHydrochloric acid (conc 37% or 7647-01-0 15,000 d
greater).Hydrocyanic acid............... 74-90-8 2,500 a, bHydrogen 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 bHydrogen sulfide............... 7783-06-4 10,000 a, bIron, 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 bMethyl 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 bNitric 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, bPhosphine...................... 7803-51-2 5,000 bPhosphorus 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 bPropionitrile [Propanenitrile]. 107-12-0 10,000 bPropyl 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, bTetramethyllead [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, b74-93-1................ Methyl mercaptan 10,000 b
[Methanethiol].75-15-0................ Carbon disulfide...... 20,000 b75-21-8................ 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 b107-11-9............... Allylamine [2-Propen-1- 10,000 b
amine].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 b110-89-4............... Piperidine............ 15,000 b123-73-9............... 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 b353-42-4............... 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 c509-14-8............... 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, b7550-45-0.............. 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, b7664-41-7.............. 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, b7782-41-4.............. Fluorine.............. 1,000 b7782-50-5.............. Chlorine.............. 2,500 a, b7783-06-4.............. Hydrogen sulfide...... 10,000 a, b7783-07-5.............. Hydrogen selenide..... 500 b7783-60-0.............. Sulfur tetrafluoride 2,500 b
[Sulfur fluoride
(SF4), (T-4)-].7784-34-1.............. Arsenous trichloride.. 15,000 b7784-42-1.............. Arsine................ 1,000 b7803-51-2.............. Phosphine............. 5,000 b8014-95-7.............. 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 b13463-40-6............. Iron, pentacarbonyl- 2,500 b
[Iron carbonyl
(Fe(CO)5), (TB-5-11)-
].19287-45-7............. Diborane.............. 2,500 b26471-62-5............. 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. 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 gAcetylene [Ethyne]............. 74-86-2 10,000 fBromotrifluorethylene [Ethene, 598-73-2 10,000 f
bromotrifluoro-].
1,3-Butadiene.................. 106-99-0 10,000 fButane......................... 106-97-8 10,000 f1-Butene....................... 106-98-9 10,000 f2-Butene....................... 107-01-7 10,000 fButene......................... 25167-67-3 10,000 f2-Butene-cis................... 590-18-1 10,000 f2-Butene-trans [2-Butene, (E)]. 624-64-6 10,000 fCarbon 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 fCyclopropane................... 75-19-4 10,000 fDichlorosilane [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 fEthyl acetylene [1-Butyne]..... 107-00-6 10,000 fEthylamine [Ethanamine]........ 75-04-7 10,000 fEthyl chloride [Ethane, chloro- 75-00-3 10,000 f
].Ethylene [Ethene].............. 74-85-1 10,000 fEthyl ether [Ethane, 1,1'- 60-29-7 10,000 g
oxybis-].Ethyl mercaptan [Ethanethiol].. 75-08-1 10,000 gEthyl nitrite [Nitrous acid, 109-95-5 10,000 f
ethyl ester].Hydrogen....................... 1333-74-0 10,000 fIsobutane [Propane, 2-methyl].. 75-28-5 10,000 fIsopentane [Butane, 2-methyl-]. 78-78-4 10,000 gIsoprene [1,3-Butadinene, 2- 78-79-5 10,000 g
methyl-].Isopropylamine [2-Propanamine]. 75-31-0 10,000 gIsopropyl chloride [Propane, 2- 75-29-6 10,000 g
chloro-].Methane........................ 74-82-8 10,000 fMethylamine [Methanamine]...... 74-89-5 10,000 f3-Methyl-1-butene.............. 563-45-1 10,000 f2-Methyl-1-butene.............. 563-46-2 10,000 gMethyl ether [Methane, oxybis-] 115-10-6 10,000 fMethyl 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 fPentane........................ 109-66-0 10,000 g1-Pentene...................... 109-67-1 10,000 g2-Pentene, (E)-................ 646-04-8 10,000 g2-Pentene, (Z)-................ 627-20-3 10,000 gPropadiene [1,2-Propadiene].... 463-49-0 10,000 fPropane........................ 74-98-6 10,000 fPropylene [1-Propene].......... 115-07-1 10,000 fPropyne [1-Propyne]............ 74-99-7 10,000 fSilane......................... 7803-62-5 10,000 fTetrafluoroethylene [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 fVinyl 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.
\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 f74-84-0........................ Ethane........................ 74-84-0 10,000 f74-85-1........................ Ethylene [Ethene]............. 74-85-1 10,000 f74-86-2........................ Acetylene [Ethyne]............ 74-86-2 10,000 f74-89-5........................ Methylamine [Methanamine]..... 74-89-5 10,000 f74-98-6........................ Propane....................... 74-98-6 10,000 f74-99-7........................ Propyne [1-Propyne]........... 74-99-7 10,000 f75-00-3........................ 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 f75-07-0........................ Acetaldehyde.................. 75-07-0 10,000 g75-08-1........................ Ethyl mercaptan [Ethanethiol]. 75-08-1 10,000 g75-19-4........................ Cyclopropane.................. 75-19-4 10,000 f75-28-5........................ Isobutane [Propane, 2-methyl]. 75-28-5 10,000 f75-29-6........................ Isopropyl chloride [Propane, 2- 75-29-6 10,000 g
chloro-].75-31-0........................ Isopropylamine [2-Propanamine] 75-31-0 10,000 g75-35-4........................ 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 g78-79-5........................ 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 f106-98-9....................... 1-Butene...................... 106-98-9 10,000 f196-99-0....................... 1,3-Butadiene................. 106-99-0 10,000 f107-00-6....................... Ethyl acetylene [1-Butyne].... 107-00-6 10,000 f107-01-7....................... 2-Butene...................... 107-01-7 10,000 f107-25-5....................... 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 g109-67-1....................... 1-Pentene..................... 109-67-1 10,000 g109-92-2....................... 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 f115-10-6....................... 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 f463-49-0....................... Propadiene [1,2-Propadiene]... 463-49-0 10,000 f463-58-1....................... 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 f557-98-2....................... 2-Chloropropylene [1-Propene, 557-98-2 10,000 g
2-chloro-].563-45-1....................... 3-Methyl-1-butene............. 563-45-1 10,000 f563-46-2....................... 2-Methyl-1-butene............. 563-46-2 10,000 g590-18-1....................... 2-Butene-cis.................. 590-18-1 10,000 f590-21-6....................... 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 f627-20-3....................... 2-Pentene, (Z)-............... 627-20-3 10,000 g646-04-8....................... 2-Pentene, (E)-............... 646-04-8 10,000 g689-97-4....................... Vinyl acetylene [1-Buten-3- 689-97-4 10,000 f
yne].1333-74-0...................... Hydrogen...................... 1333-74-0 10,000 f4109-96-0...................... 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 f10025-78-2..................... 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).
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]