Classification List of Peroxide Forming Chemicals
- Class A - Severe Peroxide Hazard
-
Spontaneously decompose and become explosive with exposure to air without concentration.
Note: Potassium metal turns yellow when peroxides are present and should be disposed of.
Butadiene (liquid monomer)
Isopropyl ether
Sodium amide (sodamide)
Chloroprene (liquid monomer)
Potassium amide
Tetrafluoroethylene (liquid monomer)
Divinyl ether
Potassium metal
Vinylidene chloride
- Class B - Concentration Hazard
-
Require external energy for spontaneous decomposition. May form explosive peroxides when distilled, evaporated or otherwise concentrated.
Acetal
Diethylene glycol dimethyl ether (diglyme)
4-Methyl-2-pentanol
Acetaldehyde
Diethyl ether (ether)
2-Pentanol
Benzyl alcohol
Dioxanes
4-Penten-1-ol
2-Butanol
Ethylene glycol ether acetates (glyme)
1-Phenylethanol
Cumene
Furan
2-Phenylethanol
Cyclohexanol
4-Heptanol
Tetrahydrofuran (THF)
Cyclohexene
2-Hexanol
Tetrahydronaphthalene (tetralin)
2-Cyclohexen-1-ol
Methylacetylene (gas)
Vinyl ethers
Decahydronaphthalene (decalin)
3-Methyl-1-butanol
Other secondary alcohols
Diacetylene (butadine, gas)
Methyl cyclopentane
Diacetylene (butadine, gas)
Dicyclopentadiene
Methyl isobutyl ketone
Dicyclopentadiene
- Class C - Shock and Heat Sensitive
-
Highly reactive and can auto-polymerize as a result of internal peroxide accumulation. The peroxides formed in these reactions are extremely shock- and heat-sensitive.
Acrylic acid
Chlorotrifluoroethylene (gas)
Vinylacetylene (gas)
Acrylonitrile
Methyl methacrylate
Vinyladiene chloride
Butadiene (gas)
Styrene
Vinyl chloride (gas)
Chlorobutadiene
Tetrafluoroethylene (gas)
Vinyl pyridine
Chloroprene
Vinyl acetate
- Class D - Potential Peroxide Forming Chemicals
-
May form peroxides but cannot be clearly categorized in Class A, B, or C.
Acrolein
p-Chlorophenetole
4,5-Hexadien-2-yn-1-ol
Allyl ether
Cyclooctene
n-Hexyl ether
Allyl ethyl ether
Cyclopropyl methyl ether
o.p-Iodophenetole
Allyl phenyl ether
Diallyl ether
Isoamyl benzyl ether
p-(n-Amyloxy)benzoyl chloride
p-Di-n-butoxybenzene
Isoamyl ether
n-Amyl ether
1,2-Dibenzyloxyethane
Isobutyl vinyl ether
Benzyl n-butyl ether
p-Dibenzyloxybenzene
Isophorone
Benzyl ether
1,2-Dichloroethyl ethyl ether
b-Isopropoxypropionitrile
Benzyl ethyl ether
2,4-Dichlorophenetole
Isopropyl-2,4,5-trichlorophenoxy acetate
Benzyl methyl ether
Diethoxymethane
n-Methylphenetole
Benzyl-1-naphthyl ether
2,2-Diethoxypropane
2-Methyltetrahydrofuran
1,2-Bis(2-chloroethoxyl)ethane
Diethyl ethoxymethylenemalonate
3-Methoxy-1-butyl acetate
Bis(2-ethoxyethyl)ether
Diethyl fumarate
2-Methoxyethanol
Bis(2-(methoxyethoxy)ethyl) ether
Diethyl acetal
2-Methoxyethyl acetate
Bis(2-chloroethyl) ether
Diethylketene
3-Methoxybutyl acetate
Bis(2-ethoxyethyl) adipate
Diethoxybenzene (m-,o-,p-)
2-Methoxyethyl vinyl ether
Bis(2-methoxyethyl) carbonate
1,2-Diethoxyethane
Methoxy-1,3,5,7-cyclooctatetraene
Bis(2-methoxyethyl) ether
Dimethoxymethane
b-Methoxypropionitrile
Bis(2-methoxyethyl) phthalate
1,1-Dimethoxyethane
m-Nitrophenetole
Bis(2-methoxymethyl) adipate
Di(1-propynl) ether
1-Octene
Bis(2-n-butoxyethyl) phthalate
Di(2-propynl) ether
Oxybis(2-ethyl acetate)
Bis(2-phenoxyethyl) ether
Di-n-propoxymethane
Oxybis(2-ethyl benzoate)
Bis(4-chlorobutyl) ether
1,2-Epoxy-3-isopropoxypropane
b,b-Oxydipropionitrile
Bis(chloromethyl) ether
1,2-Epoxy-3-phenoxypropane
1-Pentene
2-Bromomethyl ethyl ether
p-Ethoxyacetophenone
Phenoxyacetyl chloride
beta-Bromophenetole
1-(2-Ethoxyethoxy)ethyl acetate
a-Phenoxypropionyl chloride
o-Bromophenetole
2-Ethoxyethyl acetate
Phenyl-o-propyl ether
p-Bromophenetole
(2-Ethoxyethyl)-a-benzoyl benzoate
p-Phenylphenetone
3-Bromopropyl phenyl ether
1-Ethoxynaphthalene
n-Propyl ether
tert-Butyl methyl ether
o,p-Ethoxyphenyl isocyanate
n-Propyl isopropyl ether
n-Butyl phenyl ether
1-Ethoxy-2-propyne
Sodium 8-11-14-eicosatetraenoate
n-Butyl vinyl ether
3-Ethoxypropionitrile
Sodium ethoxyacetylide
Chloroacetaldehyde diethylacetal
2-Ethylacrylaldehyde oxime
Tetrahydropyran
2-Chlorobutadiene
2-Ethylbutanol
Triethylene glycol diacetate
1-(2-Chloroethoxy)-2-phenoxyethane
Ethyl-b-ethoxypropionate
Triethylene glycol dipropionate
Chloroethylene
Ethylene glycol monomethyl ether
1,3,3-Trimethoxypropene
Chloromethyl methyl ether
2-Ethylhexanal
1,1,2,3-Tetrachloro-1,3-butadiene
beta-Chlorophenetole
Ethyl vinyl ether
4-Vinyl cyclohexene
o-Chlorophenol
2,5-Hexadiyn-1-ol
Vinylene carbonate