Methyl ethyl ketone peroxide

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A colorless liquid that is a strong oxidizing agent. Methyl ethyl ketone peroxide is used as a catalyst in the curing of some polymers such as polyester, acrylic and silicone resins. Specifically, this is the catalyst used in Bio-Plastic® (Ward's Natural Science) polyester resins that is often used to embed paint cross sections. Methyl ethyl ketone peroxide is used industrially to cure fiberglass-reinforced plastics.

Synonyms and Related Terms

ethyl methyl ketone peroxide


  • Highly flammable.
  • Flash point = 58C.
  • Can be decomposed by sunlight.
  • Explosion risk when mixed with inorganic acids, accelerators or some organic materials such as acetone.
  • Skin contact causes irritation and burns.
  • Sigma-Aldrich: SDS

Physical and Chemical Properties

Composition C8H16O4
CAS 1338-23-4
Melting Point -30 C
Density 0.815 g/ml
Boiling Point 70 C (dec)

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