California Code of Regulations › Title 19 - Public Safety › Division 5 - California Environment Protection Agency › Chapter 2 - California Accidental Release Prevention (CalARP) Program Detailed Analysis › Article 9 - Regulated Substances for Accidental Release Prevention › Table 2 - Federal Regulated Flammable Substances List and Threshold Quantities for Accidental Release Prevention

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Chemical Name
CAS Number
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
Vinylmethyl 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 chapter (see Section
							 5130.5).
Note -- Basis for Listing:
a Mandated for listing by Congress.
f Flammable gas.
g Volatile flammable liquid.