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CHEMICAL ACCIDENT PREVENTION PROVISIONS

List of Regulated Toxic Substances and Threshold Quantities for Accidental Release Prevention
[Alphabetical Order--77 Substances]

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Chemical name	CAS Number	Threshold Quantity (lbs.)	Basis for listing *
Acrolein [2-Propenal]	107-02-8	5,000 b	b
Acrylonitrile [ Propenenitrile]	2-107-13-1	20,000 b	b
Acrylyl chloride [2-Propenoyl 814-68-6 chloride]	2-107-13-1	5,000 b	b
Allyl alcohol [2-Propen-l-ol]	107-18-61	15,000 b	b
Allylamine [2-Propen-l-amine]	107-11-9	10,000 b	b
Ammonia (anhydrous)	7664-41-7	10,000 a, b	a, b
Ammonia (conc 20% or greater)	7664-41-7	20,000 a, b	a, b
Arsenous trichloride	7784-34-1	15,000 b	b
Arsine	7784-42-1	1,000 b	b
Boron trichloride [Borane, trichloro-]	10294-34-5	5,000 b	b
Boron trifluoride [Borane, trifluoro-]	7637-07-2	5,000 b	b
Boron trifluoride compound with methyl ether (1:1) [Boron, trifluoro [oxybis [metane]]-, T-4-.	353-42-4	15,000 b	b
Bromine	7726-95-6	10,000 a, b	a, b
Carbon disulfid	75-15-0	20,000 b	b
Chlorine	7782-50-5	2,500 a, b	a, b
Chlorine dioxide [Chlorine oxide (ClO2)]	10049-04-4	1,000 c	c
Chloroform [Methane, trichloro- ]	67-66-3	20,000 b	b
Chloromethyl ether [Methane, oxybis[chloro-]	542-88-1	1,000 b	b
Chloromethyl methyl ether [Methane, chloromethoxy-]	107-30-2	5,000 b	b
Crotonaldehyde [2-Butenal]	4170-30-3	20,000 b	b
Crotonaldehyde, (E)- [2- Butenal, (E)-]	123-73-9	20,000 b	b
Cyanogen chloride	506-77-4	10,000 c	c
Cyclohexylamine [Cyclohexanamine]	108-91-8	15,000 b	b
Diborane	19287-45-7	2,500 b	b
Dimethyldichlorosilane [Silane, dichlorodimethyl-]	75-78-5	5,000 b	b
1,1-Dimethylhydrazine [Hydrazine, 1,1-dimethyl-]	57-14-7	15,000 b	b
Epichlorohydrin [Oxirane, (chloromethyl)-]	106-89-8	20,000 b	b
Ethylenediamine [1,2- Ethanediamine]	107-15-3	20,000 b	b
Ethyleneimine [Aziridine]	151-56-4	10,000 b	b
Ethylene oxide [Oxirane]	75-21-8	10,000 a, b	a, b
Fluorine	7782-41-4	1,000 b	b
Formaldehyde (solution)	50-00-0	15,000 b	b
Furan	110-00-9	5,000 b	b
Hydrazine	302-01-2	15,000 b	b
Hydrochloric acid (conc 37% or greater )	7647-01-0	15,000 d	d
Hydrocyanic acid	74-90-8	2,500 a, b	a, b
Hydrogen chloride (anhydrous) [Hydrochloric acid]	7647-01-0	5,000 a	a
Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid]	7664-39-3	1,000 a, b	a, b
Hydrogen selenide	7783-07-5	500 b	b
Hydrogen sulfide	7783-06-4	10,000 a, b	a, b
Iron, pentacarbonyl- [Iron carbonyl (Fe(CO)5), (TB-5-11)- ]	13463-40-6	2,500 b	b
Isobutyronitrile [Propanenitrile, 2-methyl-]	78-82-0	20,000 b	b
Isopropyl chloroformate [Carbonochloridic acid, 1- methylethyl ester]	108-23-6	15,000 b	b
Methacrylonitrile [2- Propenenitrile, 2-methyl-]	126-98-7	10,000 b	b
Methyl chloride [Methane, chloro-]	74-87-3	10,000 a	a
Methyl chloroformate [Carbonochloridic acid, methylester]	79-22-1	5,000 b	b
Methyl hydrazine [Hydrazine, methyl-]	60-34-4	15,000 b	b
Methyl isocyanate [Methane, isocyanato-]	624-83-9	10,000 a, b	a, b
Methyl mercaptan [Methanethiol]	74-93-1	10,000 b	b
Methyl thiocyanate [Thiocyanic acid, methyl ester]	556-64-9	20,000 b	b
Methyltrichlorosilane [Silane, trichloromethyl-]	75-79-6	5,000 b	b
Nickel carbonyl	13463-39-3	1,000 b	b
Nitric acid (conc 80% or greater)	7697-37-2	15,000 b	b
Nitric oxide [Nitrogen oxide (NO)]	10102-43-9	10,000 b	b
Oleum (Fuming Sulfuric acid) [Sulfuric acid, mixture with sulfur trioxide] \1\.	8014-95-7	10,000 e	e
Peracetic acid [Ethaneperoxoic acid]	79-21-0	10,000 b	b
Perchloromethylmercaptan [Methanesulfenyl chloride, trichloro-]	594-42-3	10,000 b	b
Phosgene [Carbonic dichloride]	75-44-5	500 a, b	a, b
Phosphine	7803-51-2	5,000 b	b
Phosphorus oxychloride [Phosphoryl chloride]	10025-87-3	5,000 b	b
Phosphorus trichloride [Phosphorous trichloride]	7719-12-2	5,000 b	b
Piperidine	110-89-4	5,000 b	b
Propionitrile [Propanenitrile]	107-12-0	10,000 b	b
Propyl chloroformate [Carbonochloridic acid, propylester]	109-61-5	15,000 b	b
Propyleneimine [Aziridine, 2- methyl-]	75-55-8	10,000 b	b
Propylene oxide [Oxirane, methyl-]	75-56-9	10,000 b	b
Sulfur dioxide (anhydrous)	7446-09-5	5,000 a, b	a, b
Sulfur tetrafluoride [Sulfur fluoride (SF4), (T-4)-]	7783-60-0	2,500 b	b
Sulfur trioxide	7446-11-9	10,000 a, b	a, b
Tetramethyllead [Plumbane, tetramethyl-]	75-74-1	10,000 b	b
Tetranitromethane [Methane, tetranitro-]	509-14-8	10,000 b	b
Titanium tetrachloride Titanium chloride (TiCl4) (T- 4)-]	7550-45-0	2,500 b	b
Toluene 2,4-diisocyanate [Benzene, 2,4-diisocyanato-1- methyl-] \1\.	584-84-9	10,000 a	a
Toluene 2,6-diisocyanate [Benzene, 1,3-diisocyanato-2- methyl-] \1\.	91-08-7	10,000 a	a
Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-] \1\.	26471-62-5	10,000 a	a
Trimethylchlorosilane [Silane, chlorotrimethyl-]	75-77-4	10,000 b	b
Vinyl acetate monomer [Acetic acid ethenyl ester]	108-05-4	15,000 b	b

\1\ The mixture exemption in 40 CFR 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.

List of Regulated Flammable Substances and Threshold Quantities for Accidental Release Prevention
[Alphabetical Order--63 Substances]

A B C D E F G H I J K L M N O P Q R S T U V X Y Z

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	109-95-5	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	g
2-Methyl-1-butene	563-46-2	10,000	f
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-]	7803-62-5	10,000	f
Tetramethylsilane [Silane, tetramethyl-]	7803-62-5	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]	75-50-3	10,000	f
Vinyl chloride [Ethene, chloro-]	75-50-3	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-]	75-35-4	10,000	f
Vinyl methyl ether [Ethene, methoxy-]	107-25-5	10,000	f

*Note: Basis for Listing:
a Mandated for listing by Congress.
f Flammable gas.
g Volatile flammable liquid.

** Propane is not covered under Florida ARP/RMP Act but propane is still covered under Section 112(r) of the Clean Air Act Amendments of 1990. E.P.A Region 4 will administer the Risk Management Plan for sources that have only propane as their covered chemical.