112(r) Regulated Flammable Substances
| Chemical Name
|
CAS #
|
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-Butadiene, 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-Pentadiene
|
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
|
Basis for Listing:
- Mandated for listing by Congress
- On EHS list, vapor pressure 10 mmHg or greater
- Toxic gas
- Toxicity of hydrogen chloride, potential to release hydrogen chloride, & history
of accidents
- Toxicity of sulfur trioxide and sulfuric acid, potential to release sulfur trioxide,
& history of accidents
- Flammable gas
- Volatile flammable liquid
