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WAC 296-67-285

Appendix A—List of highly hazardous chemicals, toxics and reactives (mandatory).

This appendix contains a listing of toxic and reactive highly hazardous chemicals which present a potential for a catastrophic event at or above the threshold quantity.
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
353-50-4
2500
Cellulose Nitrate
(concentration ˃12.6% nitrogen)
9004-70-0
2500
Chlorine
7782-50-5
1500
Chlorine Dioxide
10049-04-4
1000
Chlorine Pentafluoride
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
5000
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 Carbonyl (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; NO2; N204; N203)
10102-44-0
250
Nitrogen Tetroxide
(also called Nitrogen 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)
8014-94-7
1000
Osmium Tetroxide
20816-12-0
100
Oxygen Difluoride (Fluorine Monoxide)
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).
[Statutory Authority: Chapter 49.17 RCW. WSR 93-21-075 (Order 93-06), § 296-67-285, filed 10/20/93, effective 12/1/93; WSR 92-17-022 (Order 92-06), § 296-67-285, filed 8/10/92, effective 9/10/92.]
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