Perodox M (MEKP): Methyl ethyl ketone peroxide (1338-23-4) — Curing Agent for Thermoset Composites, Paints and Coatings

August 12, 2026 4 min read





Perodox M (MEKP): Methyl ethyl ketone peroxide (1338-23-4) — Curing Agent for Thermoset Composites, Paints and Coatings



Perodox M (MEKP): Methyl ethyl ketone peroxide (CAS 1338-23-4)

Industry-standard MEKP curing agent for unsaturated polyester resins at room temperature. Adjustable active oxygen content for FRP laminating, casting, and coating applications.

Quick Facts

Trade Name Perodox M (MEKP)
Chemical Name Methyl ethyl ketone peroxide
CAS Number 1338-23-4
Chemical Family Ketone Peroxide
Brand Perodox
Function Category Curing Agent
Product Line Organic Peroxides – Ketone Peroxides
Applications UPR, FRP, Composites, Coatings
Market Segment Thermoset Composites, Paints and Coatings
Physical Form Liquid
Decomposition Temperature 50°C
Molecular Weight 210.22

What Is Methyl ethyl ketone peroxide?

Methyl ethyl ketone peroxide is a ketone peroxide supplied under the Perodox brand as part of the
Organic Peroxides – Ketone Peroxides portfolio. Industry-standard MEKP curing agent for unsaturated polyester resins at room temperature. Adjustable active oxygen content for FRP laminating, casting, and coating applications. As a curing agent,
it is engineered for demanding Thermoset Composites, Paints and Coatings applications where consistency and purity are critical.

Key Properties & Specifications

  • Chemical family: Ketone Peroxide
  • CAS number: 1338-23-4
  • Physical form: Liquid
  • Decomposition temperature: 50°C
  • Active oxygen content: Variable
  • Molecular weight: 210.22

How It Works

As an organic peroxide, Methyl ethyl ketone peroxide decomposes by homolytic cleavage when heated near 50°C, generating free radicals. These radicals initiate the polymerization or crosslinking of unsaturated monomers (such as styrene, acrylates, vinyls and unsaturated polyester resins), making it a core radical initiator for thermoset and polymer manufacturing.

Primary Applications

Perodox M (MEKP) is applied across UPR, FRP, Composites, Coatings. Typical market segments include Thermoset Composites, Paints and Coatings.
Its performance profile makes it a trusted choice for formulators who need reproducible,
high-purity raw materials.

Safety, Handling & Storage

Handle Perodox M (MEKP) in accordance with its Safety Data Sheet (SDS). Store in original,
sealed packaging away from heat, ignition sources and incompatible materials, within the
recommended temperature range. Personal protective equipment and adequate ventilation are
required. Always consult the current SDS and applicable local regulations before use.

Regulatory & Compliance

Do Sender Chem supplies Methyl ethyl ketone peroxide with full documentation and supports compliance with
international chemical regulations (including REACH where applicable). For controlled
precursor grades, supply is managed under know-your-customer and licensing procedures.

Why Source Perodox M (MEKP) from Do Sender Chem?

Do Sender Chem is a global specialty chemical manufacturer offering a broad, multi-language
catalog, consistent quality and responsive technical support. With localized content in 20
languages and worldwide delivery, we help polymer, rubber and specialty producers secure
reliable curing agent supply.

Frequently Asked Questions

What is Methyl ethyl ketone peroxide used for?

Methyl ethyl ketone peroxide (trade name Perodox M (MEKP)) is used as a Curing Agent in UPR, FRP, Composites, Coatings. It serves manufacturers in the Thermoset Composites, Paints and Coatings segments.

What is the CAS number of Methyl ethyl ketone peroxide?

The CAS Registry Number of Methyl ethyl ketone peroxide is 1338-23-4. The CAS number uniquely identifies the substance and is the standard reference used in safety data sheets, regulatory filings and procurement specifications.

Is Methyl ethyl ketone peroxide classified as Ketone Peroxide?

Yes. Methyl ethyl ketone peroxide belongs to the Ketone Peroxide chemical family and is marketed under the Perodox brand as part of the Organic Peroxides – Ketone Peroxides product line.

How should Perodox M (MEKP) be stored and handled?

Perodox M (MEKP) should be stored according to its safety data sheet, away from heat, ignition sources and incompatible materials, in original sealed packaging under the recommended temperature range. Always consult the current SDS and local regulations before handling.

Which industries buy Perodox M (MEKP)?

Perodox M (MEKP) is supplied to producers in the Thermoset Composites, Paints and Coatings industries that require reliable, high-purity Curing Agent raw materials.

Related Products

Explore other ketone peroxide and curing agent products in our catalog, or contact
our team for formulation guidance.

References

  • CAS Registry Number: 1338-23-4 — Methyl ethyl ketone peroxide
  • Do Sender Chem product data sheet: Perodox M (MEKP)


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