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 1 - Federal Regulated Substances List and Threshold Quantities for Accidental Release Prevention

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Chemical Name
Also on Table 3 
							 f
CAS Number
Threshold quantity
							 (lbs)
Basis for listing
Acrolein [2-Propenal]
yes
107-02-8
5,000
b
Acrylonitrile [2-Propenenitrile]
yes
107-13-1
20,000
b
Acrylyl chloride [2-Propenoyl chloride]
yes
814-68-6
5,000
b
Allyl alcohol [2-Propen-l-ol]
yes
107-18-6
15,000
b
Allylamine [2-Propen-l-amine]
yes
107-11-9
10,000
b
Ammonia (anhydrous)
yes
7664-41-7
10,000
a,b
Ammonia (conc 20% or greater)
yes
7664-41-7
20,000
a,b
Arsenous trichloride
yes
7784-34-1
15,000
b
Arsine
yes
7784-42-1
1,000
b
Boron trichloride [Borane, trichloro-]
yes
10294-34-5
5,000
b
Boron trifluoride [Borane, trifluoro-]
yes
7637-07-2
5,000
b
Boron trifluoride compound with methyl ether (1:1)
							 [Boron, trifluoro [oxybis[metane]]]-, T-4-
yes
353-42-4
15,000
b
Bromine
yes
7726-95-6
10,000
a,b
Carbon disulfide
yes
75-15-0
20,000
b
Chlorine
yes
7782-50-5
2,500
a,b
Chlorine dioxide [Chlorine oxide (ClO2)]
no
10049-04-4
1,000
c
Chloroform [Methane, trichloro-]
yes
67-66-3
20,000
b
Chloromethyl ether [Methane, oxybis[chloro-]]
yes
542-88-1
1,000
b
Chloromethyl methyl ether [Methane,
							 chloromethoxy-]
yes
107-30-2
5,000
b
Crotonaldehyde [2-Butenal]
yes
4170-30-3
20,000
b
Crotonaldehyde, (E)- [2-Butenal, (E)-]
yes
123-73-9
20,000
b
Cyanogen chloride
no
506-77-4
10,000
c
Cyclohexylamine [Cyclohexanamine]
yes
108-91-8
15,000
b
Diborane
yes
19287-45-7
2,500
b
Dimethyldichlorosilane [Silane, dichlorodimethyl-]
yes
75-78-5
5,000
b
1,1-Dimethylhydrazine [Hydrazine,1,1-dimethyl-]
yes
57-14-7
15,000
b
Epichlorohydrin [Oxirane, (chloromethyl)-]
yes
106-89-8
20,000
b
Ethylenediamine [1,2-Ethanediamine]
yes
107-15-3
20,000
b
Ethyleneimine [Aziridine]
yes
151-56-4
10,000
b
Ethyleneoxide [Oxirane]
yes
75-21-8
10,000
a,b
Fluorine
yes
7782-41-4
1,000
b
Formaldehyde (solution)
yes
50-00-0
15,000
b
Furan
yes
110-00-9
5,000
b
Hydrazine
yes
302-01-2
15,000
b
Hydrochloric acid (conc 37% or greater)
no
7647-01-0
15,000
d
Hydrocyanic acid
yes
74-90-8
2,500
a,b
Hydrogen chloride (anhydrous) [Hydrochloric acid]
yes
7647-01-0
5,000
a
Hydrogen fluoride/Hydrofluoric acid (conc 50% or
							 greater) [Hydrofluoric acid]
yes
7664-39-3
1,000
a,b
Hydrogen selenide
yes
7783-07-5
500
b
Hydrogen sulfide
yes
7783-06-4
10,000
a,b
Iron, pentacarbonyl-[Iron carbonyl
							 (Fe(CO)5),(TB-5-11)-]
yes
13463-40-6
2,500
b
Isobutyronitrile [Propanenitrile, 2-methyl-]
yes
78-82-0
20,000
b
Isopropyl chloroformate [Carbonochloridic acid,
							 1-methylethyl ester]
yes
108-23-6
15,000
b
Methacrylonitrile [2-Propenenitrile, 2-methyl-]
yes
126-98-7
10,000
b
Methyl chloride [Methane, chloro-]
no
74-87-3
10,000
a
Methyl chloroformate [Carbonochloridic acid,
							 methylester]
yes
79-22-1
5,000
b
Methyl hydrazine [Hydrazine, methyl-]
yes
60-34-4
15,000
b
Methyl isocyanate [Methane, isocyanato-]
yes
624-83-9
10,000
a,b
Methyl mercaptan [Methanethiol]
yes
74-93-1
10,000
b
Methyl thiocyanate [Thiocyanic acid, methyl ester]
yes
556-64-9
20,000
b
Methyltrichlorosilane [Silane, trichloromethyl-]
yes
75-79-6
5,000
b
Nickel carbonyl
yes
13463-39-3
1,000
b
Nitric acid (conc 80% or greater)
yes
7697-37-2
15,000
b
Nitric oxide [Nitrogen oxide (NO)]
yes
10102-43-9
10,000
b
Oleum (Fuming Sulfuric acid) [Sulfuric acid, mixture
							 with sulfur trioxide] 
							 1
no
8014-95-7
10,000
e
Peracetic acid [Ethaneperoxoic acid]
yes
79-21-0
10,000
b
Perchloromethylmercaptan [Methanesulfenyl chloride,
							 trichloro-]
yes
594-42-3
10,000
b
Phosgene [Carbonic dichloride]
yes
75-44-5
500
a,b
Phosphine
yes
7803-51-2
5,000
b
Phosphorus oxychloride [Phosphoryl chloride]
yes
10025-87-3
5,000
b
Phosphorus trichloride [Phosphorous trichloride]
yes
7719-12-2
15,000
b
Piperidine
yes
110-89-4
15,000
b
Propionitrile [Propanenitrile]
yes
107-12-0
10,000
b
Propyl chloroformate [Carbonochloridic acid,
							 propylester]
yes
109-61-5
15,000
b
Propyleneimine [Aziridine,2-methyl-]
yes
75-55-8
10,000
b
Propylene oxide [Oxirane, methyl-]
yes
75-56-9
10,000
b
Sulfur dioxide (anhydrous)
yes
7446-09-5
5,000
a,b
Sulfur tetrafluoride [Sulfur fluoride (SF4),
							 (T-4)-]
yes
7783-60-0
2,500
b
Sulfur trioxide
yes
7446-11-9
10,000
a,b
Tetramethyllead [Plumbane, tetramethyl-]
yes
75-74-1
10,000
b
Tetranitromethane [Methane, tetranitro-]
yes
509-14-8
10,000
b
Titanium tetrachloride [Titanium chloride (TiCl4)
							 (T-4)-]
yes
7550-45-0
2,500
b
Toluene 2,4-diisocyanate [Benzene,
							 2,4-diisocyanato-1-methyl-] 
							 1
yes
584-84-9
10,000
a
Toluene 2,6-diisocyanate [Benzene,
							 1,3-diisocyanato-2-methyl-] 
							 1
yes
91-08-7
10,000
a
Toluene diisocyanate (unspecified isomer) [Benzene,
							 1,3-diisocyanatomethyl-] 
							 1
no
26471-62-5
10,000
a
Trimethylchlorosilane [Silane, chlorotrimethyl-]
yes
75-77-4
10,000
b
Vinyl acetate monomer [Acetic acid ethenyl ester]
yes
108-05-4
15,000
b
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.
f This column identifies substances which
							 may appear on Table 3. Table 3 may not have concentration limitations.
1 The exemption in Section
					 5130.2(b)(1)(B)
					 regarding portions of a process where this regulated substance is handled at
					 partial pressures below 10 mm Hg does not apply to this substance.