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Peroxide-Forming
Chemicals
The chemicals listed below can form explosive peroxide crystals on
exposure to air, and therefore require special handling procedures
after the container is opened. Some of the chemicals form peroxides
that are violently explosive in concentrated solution or as solids, and
therefore should never be evaporated to dryness. Others are
polymerizable unsaturated compounds and can initiate a runaway,
explosive polymerization reaction. All peroxidizable compounds should
be stored away from heat and light. They should be protected from
physical damage and ignition sources. A warning label should be affixed
to all
peroxidizable materials to indicate the date of receipt and the date
the container was first opened. Due to these special handling
requirements, users must have the appropriate laboratory equipment,
information, knowledge and training to use these compounds safely.
A. Severe
Peroxide Hazard with Exposure to Air
(discard within 3 months from opening)
- diisopropyl ether (isopropyl ether)
- divinylacetylene (DVA)
- vinylidene chloride (1,1-dichloroethylene)
- potassium metal
- sodium amide (sodamide)
- potassium amide
B. Peroxide
Hazard on Concentration
Do not distill or evaporate without first testing for the presence of
peroxides (discard or test for peroxides after 6 months)
- acetaldehyde diethyl acetal (acetal)
- cumene (isopropylbenzene)
- cyclohexene
- cyclopentene
- decalin (decahydronaphthalene)
- diacetylene (butadiene)
- dicyclopentadiene
- diethyl ether (ether)
- diethylene glycol dimethyl ether (diglyme)
- dioxane
- ethylene glycol dimethyl ether (glyme)
- ethylene glycol ether acetates
- ethylene glycol monoethers (cellosolves)
- furan
- methylacetylene
- methylcyclopentane
- methyl isobutyl ketone
- tetrahydrofuran (THF)
- tetralin (tetrahydronaphthalene)
- vinyl ethers
C. Hazard of
Rapid Polymerization Initiated by
Internally-Formed Peroxides
Liquids (discard or test for peroxides after 6 months)
- Chloroprene (2-chloro-1, 3-butadiene)
- vinyl acetate
- styrene
- vinylpyridine
Gases (discard after 12 months)
- butadiene
- vinylacetylene (MVA)
- tetrafluoroethylene (TFE)
- vinyl chloride
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