Environmental, Health and Safety Services

Peroxide-Forming Chemicals

The following classes of chemicals can form peroxides upon aging:

Class I: Unsaturated materials, especially those of low molecular weight, may polymerize violently and hazardously due to peroxide initiation.

Acrylic Acid Tetrafluoroethylene
Acrylonitrile Vinyl acetate
Butadiene Vinyl acetylene
Chlorobutadiene (chloroprene) Vinyl chloride
Chlorotrifluoroethylene Vinyl pyridine
Methyl methacrylate Vinylidene chloride


Class II: The following chemicals are a peroxide hazard upon concentration (distillation/evaporation). A test for peroxide should be performed if concentration is intented or suspended.

Acetal Dioxane (p-dioxane)
Cumene Ethylene glycol dimethyl ether (glyme)
Cyclohexene Furan
Cyclooctene Methyl acetylene
Cyclopentene Methyl cyclopentane
Diacetylene Methyl-i-butyl ketone
Dicylopentadiene Tetrahydrofuran
Diethylene glycol dimethyl ether (diglyme) Tetrahydronaphthalene
Diethyl ether Vinyl ethers


Class III: Peroxides derived from the following compounds may explode without concentration.

Organic Inorganic
  • Divinyl ether
  • Divinyl acetylene
  • Isopropyl ether
  • Vinylidene chloride
  • Potassium metal
  • Potassium amide
  • Sodium amide (isodamide)