Trigonox 178 VR

Product Line Organic peroxides

Methyl ethyl ketone peroxide and cumyl hydroperoxide

  • Brand

  • Chemical family

    Organic peroxide
  • CAS number

    1338-23-4; 80-15-9
  • Physical form

  • Regional availability

    North America
  • Chemical name

    Methyl ethyl ketone peroxide and cumyl hydroperoxide solution in 2,2,4-trimethyl-1,3-pentanediol diisobutanoate
  • Molecular drawing

    Organic peroxide
  • Applications

    Trigonox 178 VR is a convenient pre-blended initiator suitable for curing unsaturated polyester, vinyl ester and acrylic thermosetting resins at ambient conditions in conjunction with a metal salt. Trigonox 178 VR produces lower exotherms than standard MEKP’s and is useful in warm and hot weather climates. Applications include cast polymer and laminates.Trigonox 178 VR offers all the advantages of a red MEKP, except red parts. The vanishing red (VR) series of products includes a red indicator system that virtually disappears during cure. The red is there when you need it, but not in the finished product.

Market Segments

Thermoset composites

Detailed description

Slower reactivity MEKP/CHP blend with vanishing red cure indicator for curing promoted unsaturated polyester matrices at room temperature used to suppress exotherm in thick or hot parts.


  • Curing agent


  • Centrifugal casting,
  • Resin Transfer Molding,
  • Infusion,
  • Hand lay-up & spray-up
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Get in touch!

For more information about Trigonox 178 VR, please contact our technical experts. We look forward to hearing from you.

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