Perodox 44B: Acetyl acetone peroxide (37187-22-7) — Curing Agent for Thermoset Composites

August 12, 2026 4 min read

Medium-reactivity MEKP formulation for general-purpose FRP fabrication. Balanced gel time and cure speed for hand lay-up, spray-up, and filament winding processes.

Quick Facts

Trade Name Perodox 44B
Chemical Name Acetyl acetone peroxide
CAS Number 37187-22-7
Chemical Family Ketone Peroxide
Brand Perodox
Function Category Curing Agent
Product Line Organic Peroxides – Ketone Peroxides
Applications FRP, Hand Lay-Up, Spray-Up
Market Segment Thermoset Composites
Physical Form Liquid
Decomposition Temperature 55°C
Active Oxygen Content 9.0%
Molecular Weight

What Is Acetyl acetone peroxide?

Acetyl acetone peroxide is a ketone peroxide supplied under the Perodox brand as part of the
Organic Peroxides – Ketone Peroxides portfolio. Medium-reactivity MEKP formulation for general-purpose FRP fabrication. Balanced gel time and cure speed for hand lay-up, spray-up, and filament winding processes. As a curing agent,
it is engineered for demanding Thermoset Composites applications where consistency and purity are critical.

Key Properties & Specifications

  • Chemical family: Ketone Peroxide
  • CAS number: 37187-22-7
  • Physical form: Liquid
  • Decomposition temperature: 55°C
  • Active oxygen content: 9.0%
  • Molecular weight:

How It Works

As an organic peroxide, Acetyl acetone peroxide decomposes by homolytic cleavage when heated near 55°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 44B is applied across FRP, Hand Lay-Up, Spray-Up. Typical market segments include Thermoset Composites.
Its performance profile makes it a trusted choice for formulators who need reproducible,
high-purity raw materials.

Safety, Handling & Storage

Handle Perodox 44B 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 Acetyl acetone 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 44B 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 Acetyl acetone peroxide used for?

Acetyl acetone peroxide (trade name Perodox 44B) is used as a Curing Agent in FRP, Hand Lay-Up, Spray-Up. It serves manufacturers in the Thermoset Composites segments.

What is the CAS number of Acetyl acetone peroxide?

The CAS Registry Number of Acetyl acetone peroxide is 37187-22-7. The CAS number uniquely identifies the substance and is the standard reference used in safety data sheets, regulatory filings and procurement specifications.

Is Acetyl acetone peroxide classified as Ketone Peroxide?

Yes. Acetyl acetone 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 44B be stored and handled?

Perodox 44B 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 44B?

Perodox 44B is supplied to producers in the Thermoset Composites 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: 37187-22-7 — Acetyl acetone peroxide
  • Do Sender Chem product data sheet: Perodox 44B

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