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 3 - State 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 1 
							 1
CAS Number
State Threshold quantity (lbs)
Acetone Cyanohydrin 
							 2
no
75-86-5
1,000
Acetone Thiosemicarbazide
no
1752-30-3
1,000/10,000 
							 3
Acrolein
yes
107-02-8
500
Acrylamide
no
79-06-1
1,000/10,000 
							 3
Acrylonitrile
yes
107-13-1
10,000
Acrylyl Chloride
yes
814-68-6
100
Aldicarb
no
116-06-3
100/10,000 
							 3
Aldrin
no
309-00-2
500/10,000 
							 3
Allyl Alcohol
yes
107-18-6
1,000
Allylamine
yes
107-11-9
500
Aluminum Phosphide 
							 4
no
20859-73-8
500
Aminopterin
no
54-62-6
500/10,000 
							 3
Amiton Oxalate
no
3734-97-2
100/10,000 
							 3
Ammonia 
							 5
yes
7664-41-7
500
Aniline 
							 2
no
62-53-3
1,000
Antimycin A
no
1397-94-0
1,000/10,000 
							 3
ANTU
no
86-88-4
500/10,000 
							 3
Arsenic Pentoxide
no
1303-28-2
100/10,000 
							 3
Arsenous Oxide
no
1327-53-3
100/10,000 
							 3
Arsenous Trichloride
yes
7784-34-1
500
Arsine
yes
7784-42-1
100
Azinphos-Ethyl
no
2642-71-9
100/10,000 
							 3
Azinphos-Methyl
no
86-50-0
10/10,000 
							 3
Benzene, 1-(Chloromethyl)-4-Nitro-
no
100-14-1
500/10,000 
							 3
Benzenearsonic Acid
no
98-05-5
10/10,000 
							 3
Benzimidazole, 4,5-Dichloro-2-(Trifluoromethyl)-
no
3615-21-2
500/10,000 
							 3
Benzotrichloride 
							 2
no
98-07-7
100
Bicyclo[2.2.1] Heptane-2-Carbonitrile, 5-Chloro-
							 6-((((Methylamino) Carbonyl)Oxy)Imino)-, (1s-(1-alpha, 2-beta, 4-alpha,
							 5-alpha, 6E))-.
no
15271-41-7
500/10,000 
							 3
Bis(Chloromethyl) Ketone
no
534-07-6
10/10,000 
							 3
Bitoscanate
no
4044-65-9
500/10,000 
							 3
Boron Trichloride
yes
10294-34-5
500
Boron Trifluoride
yes
7637-07-2
500
Boron Trifluoride Compound w/ Methyl Ether (1:1)
yes
353-42-4
1,000
Bromadiolone
no
28772-56-7
100/10,000 
							 3
Bromine
yes
7726-95-6
500
Cadmium Oxide
no
1306-19-0
100/10,000 
							 3
Cadmium Stearate
no
2223-93-0
1,000/10,000 
							 3
Calcium Arsenate
no
7778-44-1
500/10,000 
							 3
Camphechlor
no
8001-35-2
500/10,000 
							 3
Cantharidin
no
56-25-7
100/10,000 
							 3
Carbachol Chloride
no
51-83-2
500/10,000 
							 3
Carbamic Acid, Methyl-,o-(((2,4-Dimethyl-1,
							 3-Dithiolan-2-yl)Methylene) Amino)-.
no
26419-73-8
100/10,000 
							 3
Carbofuran
no
1563-66-2
10/10,000 
							 3
Carbon Disulfide
yes
75-15-0
10,000
Chlorine
yes
7782-50-5
100
Chlormequat Chloride
no
999-81-5
100/10,000 
							 3
Chloroacetic Acid
no
79-11-8
100/10,000 
							 3
Chloroform
yes
67-66-3
10,000
Chloromethyl Ether
yes
542-88-1
100
Chloromethyl Methyl Ether
yes
107-30-2
100
Chlorophacinone
no
3691-35-8
100/10,000 
							 3
Chloroxuron
no
1982-47-4
500/10,000 
							 3
Chromic Chloride
no
10025-73-7
1/10,000 
							 3
Cobalt Carbonyl
no
10210-68-1
10/10,000 
							 3
Cobalt, ((2,2'-(1,2-Ethanediylbis (Nitrilomethylidyne))
							 Bis(6-Fluorophenolato))(2-)-N,N',O,O')-.
no
62207-76-5
100/10,000 
							 3
Colchicine
no
64-86-8
10/10,000 
							 3
Coumaphos
no
56-72-4
100/10,000 
							 3
Coumatetralyl
no
5836-29-3
500/10,000 
							 3
Cresol, o-
no
95-48-7
1,000/10,000 
							 3
Crimidine
no
535-89-7
100/10,000 
							 3
Crotonaldehyde
yes
4170-30-3
1,000
Crotonaldehyde, (E)-
yes
123-73-9
1,000
Cyanogen Bromide
no
506-68-3
500/10,000 
							 3
Cyanogen Iodide
no
506-78-5
1,000/10,000 
							 3
Cyanuric Fluoride
no
675-14-9
100
Cycloheximide
no
66-81-9
100/10,000 
							 3
Cyclohexylamine
yes
108-91-8
10,000
Decaborane(14)
no
17702-41-9
500/10,000 
							 3
Dialifor
no
10311-84-9
100/10,000 
							 3
Diborane
yes
19287-45-7
100
Diepoxybutane 
							 2
no
1464-53-5
500
Digitoxin
no
71-63-6
100/10,000 
							 3
Digoxin
no
20830-75-5
10/10,000 
							 3
Dimethoate
no
60-51-5
500/10,000 
							 3
Dimethyldichlorosilane
yes
75-78-5
500
Dimethylhydrazine
yes
57-14-7
1,000
Dimethyl-p-Phenylenediamine
no
99-98-9
10/10,000 
							 3
Dimethyl Sulfate 
							 2
no
77-78-1
500
Dimetilan
no
644-64-4
500/10,000 
							 3
Dinitrocresol
no
534-52-1
10/10,000 
							 3
Dinoseb
no
88-85-7
100/10,000 
							 3
Dinoterb
no
1420-07-1
500/10,000 
							 3
Diphacinone
no
82-66-6
10/10,000 
							 3
Disulfoton 
							 2
no
298-04-4
500
Dithiazanine Iodide
no
514-73-8
500/10,000 
							 3
Dithiobiuret
no
541-53-7
100/10,000 
							 3
Emetine, Dihydrochloride
no
316-42-7
1/10,000 
							 3
Endosulfan
no
115-29-7
10/10,000 
							 3
Endothion
no
2778-04-3
500/10,000 
							 3
Endrin
no
72-20-8
500/10,000 
							 3
Epichlorohydrin
yes
106-89-8
1,000
EPN
no
2104-64-5
100/10,000 
							 3
Ergocalciferol
no
50-14-6
1,000/10,000 
							 3
Ergotamine Tartrate
no
379-79-3
500/10,000 
							 3
Ethylenediamine
yes
107-15-3
10,000
Ethylene Fluorohydrin
no
371-62-0
10
Ethyleneimine
yes
151-56-4
500
Ethylene Oxide
yes
75-21-8
1,000
Fenamiphos
no
22224-92-6
10/10,000 
							 3
Fluenetil
no
4301-50-2
100/10,000 
							 3
Fluorine
yes
7782-41-4
500
Fluoroacetamide
no
640-19-7
100/10,000 
							 3
Fluoroacetic Acid
no
144-49-0
10/10,000 
							 3
Fluoroacetyl Chloride
no
359-06-8
10
Fluorouracil
no
51-21-8
500/10,000 
							 3
Formaldehyde 
							 5
yes
50-00-0
500
Formetanate Hydrochloride
no
23422-53-9
500/10,000 
							 3
Formparanate
no
17702-57-7
100/10,000 
							 3
Fuberidazole
no
3878-19-1
100/10,000 
							 3
Furan
yes
110-00-9
500
Gallium Trichloride
no
13450-90-3
500/10,000 
							 3
Hydrazine
yes
302-01-2
1,000
Hydrocyanic Acid
yes
74-90-8
100
Hydrogen Chloride (gas only)
yes
7647-01-0
500
Hydrogen Fluoride
yes
7664-39-3
100
Hydrogen Selenide
yes
7783-07-5
10
Hydrogen Sulfide
yes
7783-06-4
500
Hydroquinone 
							 6
no
123-31-9
500/10,000 
							 3
Iron, Pentacarbonyl-
yes
13463-40-6
100
Isobenzan
no
297-78-9
100/10,000 
							 3
Isobutyronitrile
yes
78-82-0
1,000
Isocyanic Acid, 3,4-Dichlorophenyl Ester
no
102-36-3
500/10,000 
							 3
Isodrin
no
465-73-6
100/10,000 
							 3
Isophorone Diisocyanate
no
4098-71-9
100
Isopropyl Chloroformate
yes
108-23-6
1,000
Leptophos
no
21609-90-5
500/10,000 
							 3
Lewisite 
							 2
no
541-25-3
10
Lindane
no
58-89-9
1,000/10,000 
							 3
Lithium Hydride 
							 4
no
7580-67-8
100
Malononitrile
no
109-77-3
500/10,000 
							 3
Manganese, Tricarbonyl Methylcyclopentadienyl 
							 2
no
12108-13-3
100
Mechlorethamine 
							 2
no
51-75-2
10
Mercuric Acetate
no
1600-27-7
500/10,000 
							 3
Mercuric Chloride
no
7487-94-7
500/10,000 
							 3
Mercuric Oxide
no
21908-53-2
500/10,000 
							 3
Methacrylonitrile
yes
126-98-7
500
Methacryloyl Chloride
no
920-46-7
100
Methacryloyloxyethyl Isocyanate
no
30674-80-7
100
Methamidophos
no
10265-92-6
100/10,000 
							 3
Methanesulfonyl Fluoride
no
558-25-8
1,000
Methidathion
no
950-37-8
500/10,000 
							 3
Methiocarb
no
2032-65-7
500/10,000 
							 3
Methomyl
no
16752-77-5
500/10,000 
							 3
Methoxyethylmercuric Acetate
no
151-38-2
500/10,000 
							 3
Methyl Bromide
no
74-83-9
1,000
Methyl 2-Chloroacrylate
no
80-63-7
500
Methyl Chloroformate
yes
79-22-1
500
Methyl Hydrazine
yes
60-34-4
500
Methyl Isocyanate
yes
624-83-9
500
Methyl Isothiocyanate 
							 4
no
556-61-6
500
Methyl Mercaptan
yes
74-93-1
500
Methylmercuric Dicyanamide
no
502-39-6
500/10,000 
							 3
Methyl Phosphonic Dichloride 
							 4
no
676-97-1
100
Methyl Thiocyanate
yes
556-64-9
10,000
Methyltrichlorosilane
yes
75-79-6
500
Methyl Vinyl Ketone
no
78-94-4
10
Metolcarb
no
1129-41-5
100/10,000 
							 3
Mexacarbate
no
315-18-4
500/10,000 
							 3
Mitomycin C
no
50-07-7
500/10,000 
							 3
Monocrotophos
no
6923-22-4
10/10,000 
							 3
Muscimol
no
2763-96-4
500/10,000 
							 3
Mustard Gas 
							 2
no
505-60-2
500
Nickel Carbonyl
yes
13463-39-3
1
Nicotine Sulfate
no
65-30-5
100/10,000 
							 3
Nitric Acid
yes
7697-37-2
1,000
Nitric Oxide
yes
10102-43-9
100
Nitrobenzene 
							 2
no
98-95-3
10,000
Nitrogen Dioxide
no
10102-44-0
100
Norbormide
no
991-42-4
100/10,000 
							 3
Organorhodium Complex (PMN-82-147)
no
MIXTURE
10/10,000 
							 3
Ouabain
no
630-60-4
100/10,000 
							 3
Oxamyl
no
23135-22-0
100/10,000 
							 3
Ozone
no
10028-15-6
100
Paraquat Dichloride
no
1910-42-5
10/10,000 
							 3
Paraquat Methosulfate
no
2074-50-2
10/10,000 
							 3
Parathion-Methyl
no
298-00-0
100/10,000 
							 3
Paris Green
no
12002-03-8
500/10,000 
							 3
Pentaborane
no
19624-22-7
500
Pentadecylamine
no
2570-26-5
100/10,000 
							 3
Peracetic Acid
yes
79-21-0
500
Perchloromethylmercaptan
yes
594-42-3
500
Phenol
no
108-95-2
500/10,000 
							 3
Phenol, 2,2'-Thiobis(4-Chloro-6-Methyl)-
no
4418-66-0
100/10,000 
							 3
Phenol, 3-(1-Methylethyl)-, Methylcarbamate
no
64-00-6
500/10,000 
							 3
Phenoxarsine, 10, 10' -- Oxydi-
no
58-36-6
500/10,000 
							 3
Phenyl Dichloroarsine 
							 2
no
696-28-6
500
Phenylhydrazine Hydrochloride
no
59-88-1
1,000/10,000 
							 3
Phenylmercury Acetate
no
62-38-4
500/10,000 
							 3
Phenylsilatrane
no
2097-19-0
100/10,000 
							 3
Phenylthiourea
no
103-85-5
100/10,000 
							 3
Phorate 
							 2
no
298-02-2
10
Phosacetim
no
4104-14-7
100/10,000 
							 3
Phosfolan
no
947-02-4
100/10,000 
							 3
Phosgene
yes
75-44-5
10
Phosmet
no
732-11-6
10/10,000 
							 3
Phosphine
yes
7803-51-2
500
Phosphonothioic Acid, Methyl-,
							 S-(2-(Bis(1-Methylethyl)Amino)Ethyl) O-Ethyl Ester. 
							 2
no
50782-69-9
100
Phosphorus 
							 4
no
7723-14-0
100
Phosphorus Oxychloride
yes
10025-87-3
500
Phosphorus Pentachloride 
							 4
no
10026-13-8
500
Phosphorus Trichloride
yes
7719-12-2
1,000
Physostigmine
no
57-47-6
100/10,000 
							 3
Physostigmine, Salicylate (1:1)
no
57-64-7
100/10,000 
							 3
Picrotoxin
no
124-87-8
500/10,000 
							 3
Piperidine
yes
110-89-4
1,000
Potassium Arsenite
no
10124-50-2
500/10,000 
							 3
Potassium Cyanide 
							 4
no
151-50-8
100
Potassium Silver Cyanide 
							 4
no
506-61-6
500
Promecarb
no
2631-37-0
500/10,000 
							 3
Propargyl Bromide
no
106-96-7
10
Propiolactone, Beta- 
							 2
no
57-57-8
500
Propionitrile
yes
107-12-0
500
Propiophenone, 4-Amino-
no
70-69-9
100/10,000 
							 3
Propyl Chloroformate
yes
109-61-5
500
Prothoate
no
2275-18-5
100/10,000 
							 3
Pyrene
no
129-00-0
1,000/10,000 
							 3
Pyridine, 4-Amino-
no
504-24-5
500/10,000 
							 3
Pyridine, 4-Nitro-, 1-Oxide
no
1124-33-0
500/10,000 
							 3
Pyriminil
no
53558-25-1
100/10,000 
							 3
Salcomine
no
14167-18-1
500/10,000 
							 3
Sarin 
							 2
no
107-44-8
10
Selenious Acid
no
7783-00-8
1,000/10,000 
							 3
Semicarbazide Hydrochloride
no
563-41-7
1,000/10,000 
							 3
Sodium Arsenate
no
7631-89-2
1,000/10,000 
							 3
Sodium Arsenite
no
7784-46-5
500/10,000 
							 3
Sodium Azide (Na (N3)) 
							 4
no
26628-22-8
500
Sodium Cacodylate
no
124-65-2
100/10,000 
							 3
Sodium Cyanide (Na (CN)) 
							 4
no
143-33-9
100
Sodium Fluoroacetate
no
62-74-8
10/10,000 
							 3
Sodium Selenate
no
13410-01-0
100/10,000 
							 3
Sodium Selenite
no
10102-18-8
100/10,000 
							 3
Sodium Tellurite
no
10102-20-2
500/10,000 
							 3
Stannane, Acetoxytriphenyl-
no
900-95-8
500/10,000 
							 3
Strychnine
no
57-24-9
100/10,000 
							 3
Strychnine Sulfate
no
60-41-3
100/10,000 
							 3
Sulfur Dioxide
yes
7446-09-5
500
Sulfuric Acid 
							 7
no
7664-93-9
1,000
Sulfur Tetrafluoride
yes
7783-60-0
100
Sulfur Trioxide 
							 4
yes
7446-11-9
100
Tabun 
							 2
no
77-81-6
10
Tellurium Hexafluoride
no
7783-80-4
100
Tetramethyllead
yes
75-74-1
100
Tetranitromethane
yes
509-14-8
500
Thallium Sulfate
no
10031-59-1
100/10,000 
							 3
Thallous Carbonate
no
6533-73-9
100/10,000 
							 3
Thallous Chloride
no
7791-12-0
100/10,000 
							 3
Thallous Malonate
no
2757-18-8
100/10,000 
							 3
Thallous Sulfate
no
7446-18-6
100/10,000 
							 3
Thiocarbazide
no
2231-57-4
1,000/10,000 
							 3
Thiofanox
no
39196-18-4
100/10,000 
							 3
Thiosemicarbazide
no
79-19-6
100/10,000 
							 3
Thiourea, (2-Chlorophenyl)-
no
5344-82-1
100/10,000 
							 3
Thiourea, (2-Methylphenyl)-
no
614-78-8
500/10,000 
							 3
Titanium Tetrachloride
yes
7550-45-0
100
Toluene-2,4-Diisocyanate 
							 8
yes
584-84-9
500
Toluene-2,6-Diisocyanate 
							 8
yes
91-08-7
100
Triamiphos
no
1031-47-6
500/10,000 
							 3
Trichloro(Chloromethyl)Silane
no
1558-25-4
100
Trichloro(Dichlorophenyl)Silane
no
27137-85-5
500
Triethoxysilane
no
998-30-1
500
Trimethylchlorosilane
yes
75-77-4
1,000
Trimethylolpropane Phosphite
no
824-11-3
100/10,000 
							 3
Trimethyltin Chloride
no
1066-45-1
500/10,000 
							 3
Triphenyltin Chloride
no
639-58-7
500/10,000 
							 3
Tris(2-Chloroethyl)Amine 
							 2
no
555-77-1
100
Valinomycin
no
2001-95-8
1,000/10,000 
							 3
Vanadium Pentoxide
no
1314-62-1
100/10,000 
							 3
Vinyl Acetate Monomer
yes
108-05-4
1,000
Warfarin
no
81-81-2
500/10,000 
							 3
Warfarin Sodium
no
129-06-6
100/10,000 
							 3
Xylylene Dichloride
no
28347-13-9
100/10,000 
							 3
Zinc, Dichloro(4,4-Dimethyl-5((((Methylamino)
							 Carbonyl)Oxy)Imino)
Pentanenitrile)-, (T-4)-.
no
58270-08-9
100/10,000 
							 3
Zinc Phosphide 
							 4
no
1314-84-7
500
a. If concentrated with greater than 100
							 pounds of sulfur trioxide or the acid meets the definition of oleum. (The Table
							 3 threshold for sulfur trioxide is 100 pounds.) (The Table 1 threshold for
							 oleum is 10,000 pounds.)
b. If in a container with flammable
							 hydrocarbons (flash point < 73° F).
1 This column identifies
					 substances which may appear on Table 1. Table 1 may have concentration
					 limitations.
2 Substances that failed the
					 evaluation pursuant to Section
					 25532(g)(2) of
					 the HSC but remain listed pursuant to potential health impacts. The exemption
					 in Section
					 5130.2(b)(1)(B)
					 regarding portions of a process where these regulated substances are handled at
					 partial pressures below 10 mm Hg does not apply to these substances.
3 These extremely hazardous
					 substances are solids. The lesser quantity listed applies only if in powdered
					 form and with a particle size of less than 100 microns; or if handled in
					 solution or in molten form; or the substance has an NFPA rating for reactivity
					 of 2, 3, or 4. Otherwise, a 10,000 pound threshold applies. The exemption in
					 Section 5130.2(b)(1)(B)
					 regarding portions of a process where these regulated substances are handled at
					 partial pressures below 10 mm Hg does not apply to these substances.
4 These extremely hazardous
					 substances are reactive solids. The exemption in Section
					 5130.2(b)(1)(B)
					 regarding portions of a process where these regulated substances are handled at
					 partial pressures below 10 mm Hg does not apply to these substances.
5 Appropriate synonyms or
					 mixtures of extremely hazardous substances with the same CAS number are also
					 regulated, e.g., formalin. The listing of ammonia includes anhydrous and
					 aqueous forms of ammonia pursuant to Section
					 25532(g)(2).
6 Hydroquinone is exempt in
					 crystalline form.
7 Sulfuric acid fails the
					 evaluation pursuant to Section
					 25532(g)(2) of
					 the HSC but remains listed as a Regulated Substance only under the following
					 conditions:
8 The exemption in Section
					 5130.2(b)(1)(B)
					 regarding portions of a process where these regulated substances are handled at
					 partial pressures below 10 mm Hg does not apply to these substances.