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Title 8. Industrial Relations
Division 1. Department of Industrial Relations
Chapter 4. Division of Industrial Safety
Subchapter 7. General Industry Safety Orders
Group 16. Control of Hazardous Substances
Full text of all sections at this level Article 109. Hazardous Substances and Processes
Current selectionAppendix A to Section 5189 - List of Acutely Hazardous Chemicals, Toxics and Reactives (Mandatory)
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§5189. Process Safety Management of Acutely Hazardous Materials, Appendix A - List of Acutely Hazardous Chemicals, Toxics and Reactives (Mandatory)

This Appendix contains a listing of substances which present a potential for a catastrophic event at or above the threshold quantity (TQ).

CHEMICAL name
CAS *
TQ **
Acetaldehyde....................................................................................
75-07-0
2500
Acrolein (2-Propenal)........................................................................
107-02-8
150
Acrylyl Chloride.................................................................................
814-68-6
250
Allyl Chloride.....................................................................................
107-05-1
1000
Allylamine.........................................................................................
107-11-9
1000
Alkylaluminums.................................................................................
Varies
5000
Ammonia, Anhydrous.......................................................................
7664-41-7
10000
Ammonia solutions (> 44% ammonia by weight................................
7664-41-7
15000
Ammonium Perchlorate....................................................................
7790-98-9
7500
Ammonium Permanganate................................................................
7787-36-2
7500
Arsine (also called Arsenic Hydride)....................................................
7784-42-1
100
Bis(Chloromethyl) Ether....................................................................
542-88-1
100
Boron Trichloride..............................................................................
10294-34-5
2500
Boron Trifluoride...............................................................................
7637-07-2
250
Bromine...........................................................................................
7726-95-6
1500
Bromine Chloride..............................................................................
13863-41-7
1500
Bromine Pentafluoride.......................................................................
7789-30-2
2500
Bromine Trifluoride............................................................................
7787-71-5
15000
3-Bromopropyne (also called Propargyl Bromide)..............................
106-96-7
100
Butyl Hydroperoxide (Tertiary)..........................................................
75-91-2
5000
Butyl Perbenzoate (Tertiary).............................................................
614-45-9
7500
Carbonyl Chloride (see Phosgene).....................................................
75-44-5
100
Carbonyl Fluoride Cellulose Nitrate (concentration > 12.6% nitrogen).
9004-70-0
2500
Chlorine...........................................................................................
7782-50-5
1500
Chlorine Dioxide................................................................................
10049-04-4
1000
Chlorine Pentrafluoride......................................................................
13637-63-3
1000
Chlorine Trifluoride............................................................................
7790-91-2
1000
Chlorodiethylaluminum (also called Diethylaluminum Chloride)............
96-10-6
5000
1-Chloro-2,4-Dinitrobenzene............................................................
97-00-7
5000
Chloromethyl Methyl Ether................................................................
107-30-2
500
Chloropicrin......................................................................................
76-06-2
500
Chloropicrin and Methyl Bromide mixture...........................................
None
1500
Chloropicrin and Methyl Chloride mixture...........................................
None
1500
Cumene Hydroperoxide....................................................................
80-15-9
5000
Cyanogen........................................................................................
460-19-5
2500
Cyanogen Chloride...........................................................................
506-77-4
500
Cyanuric Fluoride..............................................................................
675-14-9
100
Diacetyl Peroxide (Concentration > 70%)..........................................
110-22-5
5000
Diazomethane..................................................................................
334-88-3
500
Dibenzoyl Peroxide...........................................................................
94-36-0
7500
Diborane..........................................................................................
19287-45-7
100
Dibutyl Peroxide (Tertiary)................................................................
110-05-4
5000
Dichloro Acetylene............................................................................
7572-29-4
250
Dichlorosilane...................................................................................
4109-96-0
2500
Diethylzinc........................................................................................
557-20-0
10000
Diisopropyl Peroxydicarbonate..........................................................
105-64-6
7500
Dilaluroyl Peroxide............................................................................
105-74-8
7500
Dimethyldichlorosilane.......................................................................
75-78-5
1000
Dimethylhydrazine, 1,1-....................................................................
57-14-7
1000
Dimethylamine, Anhydrous................................................................
124-40-3
2500
2,4-Dinitroaniline..............................................................................
97-02-9
5000
Ethyl Methyl Ketone Peroxide (also
Methyl Ethyl Ketone Peroxide;
concentration > 60%)......................................................................
1338-23-4
5000
Ethyl Nitrite......................................................................................
109-95-5
5000
Ethylamine.......................................................................................
75-04-7
7500
Ethylene Fluorohydrin.......................................................................
371-62-0
100
Ethylene Oxide.................................................................................
75-21-8
5000
Ethyleneimine...................................................................................
151-56-4
1000
Fluorine............................................................................................
7782-41-4
1000
Formaldehyde (Formalin)..................................................................
50-00-0
1000
Furan...............................................................................................
110-00-9
500
Hexafluoroacetone...........................................................................
684-16-2
5000
Hydrochloric Acid, Anhydrous............................................................
7647-01-0
500
Hydrofluoric Acid, Anhydrous.............................................................
7664-39-3
1000
Hydrogen Bromide............................................................................
10035-10-6
5000
Hydrogen Chloride............................................................................
7647-01-0
5000
Hydrogen Cyanide, Anhydrous..........................................................
74-90-8
1000
Hydrogen Fluoride............................................................................
7664-39-3
1000
Hydrogen Peroxide (52% by weight
or greater........................................................................................
7722-84-1
7500
Hydrogen Selenide............................................................................
7783-07-5
150
Hydrogen Sulfide..............................................................................
7783-06-4
1500
Hydroxylamine.................................................................................
7803-49-8
2500
Iron, Pentacarbonyl..........................................................................
13463-40-6
250
Isopropylamine.................................................................................
75-31-0
5000
Ketene.............................................................................................
463-51-4
100
Methacrylaldehyde............................................................................
78-85-3
1000
Methacryloyl Chloride........................................................................
920-46-7
150
Methacryloyloxyethyl Isocyanate......................................................
30674-80-7
100
Methyl Acrylonitrile............................................................................
126-98-7
250
Methylamine, Anhydrous...................................................................
74-89-5
1000
Methyl Bromide................................................................................
74-83-9
2500
Methyl Chloride.................................................................................
74-87-3
15000
Methyl Chloroformate.......................................................................
79-22-1
500
Methyl Ethyl Ketone Peroxide
(concentration > 60%).....................................................................
1338-23-4
5000
Methyl Fluoroacetate........................................................................
453-18-9
100
Methyl Fluorosulfate.........................................................................
421-20-5
100
Methyl Hydrazine..............................................................................
60-34-4
100
Methyl Iodide....................................................................................
74-88-4
7500
Methyl Isocyanate............................................................................
624-83-9
250
Methyl Mercaptan.............................................................................
74-93-1
5000
Methyl Vinyl Ketone..........................................................................
79-84-4
100
Methyltrichlorosilane.........................................................................
75-79-6
500
Nickel Carbonly (Nickel
Tetracarbonyl)..................................................................................
13463-39-3
150
Nitric Acid (94.5% by weight or
greater)...........................................................................................
7697-37-2
500
Nitric Oxide.......................................................................................
10102-43-9
250
Nitroaniline (para Nitroaniline.............................................................
100-01-6
5000
Nitromethane...................................................................................
75-52-5
2500
Nitrogen Dioxide...............................................................................
10102-44-0
250
Nitrogen Oxides (NO; NO 2; N204;
N203)..............................................................................................
10102-44-0
250
Nitrogen Tetroxide (also called Nitro
gen Peroxide)...................................................................................
10544-72-6
250
Nitrogen Trifluoride...........................................................................
7783-54-2
5000
Nitrogen Trioxide..............................................................................
10544-73-7
250
Oleum (65% to 80% by weight; also
called Fuming Sulfuric Acid)...............................................................
8014-95-7
1000
Osmium Tetroxide............................................................................
20616-12-0
100
Oxygen Difluoride (Fluorine Monox-
ide)..................................................................................................
7783-41-7
100
Ozone..............................................................................................
10028-15-6
100
Pentaborane.....................................................................................
19624-22-7
100
Peracetic Acid (concentration > 60%
Acetic Acid; also called
Peroxyacetic Acid)............................................................................
79-21-0
1000
Perchloric Acid (concentration > 60%
by weight)........................................................................................
7601-90-3
5000
Perchloromethyl Mercaptan...............................................................
594-42-3
150
Perchloryl Fluoride............................................................................
7616-94-6
5000
Peroxyacetic Acid (concentration >
60% Acetic Acid; also called
Peracetic Acid)..................................................................................
79-21-0
1000
Phosgene (also called Carbonyl
Chloride)..........................................................................................
75-44-5
100
Phosphine (Hydrogen Phosphide)......................................................
7803-51-2
100
Phosphorus Oxychloride (also called
Phosphoryl Chloride).........................................................................
10025-87-3
1000
Phosphorus Trichloride......................................................................
7719-12-2
1000
Phosphoryl Chloride (also called
Phosphorus Oxychloride)..................................................................
10025-87-3
1000
Propargyl Bromide............................................................................
106-96-7
100
Propyl Nitrate...................................................................................
627-3-4
2500
Sarin................................................................................................
107-44-8
100
Selenium Hexafluoride.......................................................................
7783-79-1
1000
Stibine (Antimony Hydride)...............................................................
7803-52-3
500
Sulfur Dioxide (liquid)........................................................................
7446-09-5
1000
Sulfur Pentafluoride...........................................................................
5714-22-7
250
Sulfur Tetrafluoride...........................................................................
7783-60-0
250
Sulfur Trioxide (also called Sulfuric
Anhydride).......................................................................................
7446-11-9
1000
Sulfuric Anhydride (also called Sulfur
Trioxide)..........................................................................................
7446-11-9
1000
Tellurium Hexafluoride.......................................................................
7783-80-4
250
Tetrafluoroethylene..........................................................................
116-14-3
5000
Tetrafluorohydrazine.........................................................................
10036-47-2
5000
Tetramethyl Lead.............................................................................
75-74-1
1000
Thionyl Chloride................................................................................
7719-09-7
250
Trichloro (chloromethyl) Silane..........................................................
1558-25-4
100
Trichloro (dichlorophenyl) Silane........................................................
27137-85-5
2500
Trichlorosilane..................................................................................
10025-78-2
5000
Trifluorochloroethylene.....................................................................
79-38-9
10000
Trimethyoxysilane............................................................................
2487-90-3
1500

*Chemical Abstract Service Number.

**Threshold Quantity in Pounds (Amount necessary to be covered by this standard).

Note: Authority cited: Section 142.3, Labor Code. Reference: Sections 142.3 and 7856, Labor Code.

8 CCR Appendix A, 8 CA ADC Appendix A

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