Cadox M-30a VRN

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Organic peroxide

Cadox M-30a VRN is a low concentration special purpose catalyst including a Vanishing Red Indicator System used for curing promoted unsaturated polyester resins at room temperature. This reduced strength of a highly reactive catalyst facilitates better cure control in warm production conditions while still providing a red indicating dye which allows the user to follow the cure by color.

  • Product name

    Cadox M-30a VRN
  • Chemical family

    Organic peroxide
  • CAS number

  • Physical form

  • Regional availability

    Latin America, North America
  • Chemical name

    Methyl ethyl ketone peroxide
  • Applications

    Cadox M-30a VRN can be used in place of Cadox M-50a or Cadox M-50a VRN wherever a more dilute solution of methyl ethyl ketone peroxide (MEKP) is desired. Cadox M-30a VRN is a special purpose ‘summer catalyst’ for use in warmer shop environments. Cadox M-30a VRN offers all the advantages of a red MEKP, except red parts. The VRN 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. Visualize Hot & Cold Spots, Shrinkage Problems, Mass Effects, Thermal Effects of fillers, the Optimal Time to Trim Parts and Dead Flow Zones in applications like Vacuum Infusion. Key features are: indicates initiator presence, monitor mixing, monitor cure by color, no more RED parts.

Market Segments

Thermoset composites

Detailed description

Special purpose catalyst with vanishing red cure indicator for curing promoted unsaturated polyester resins in warmer climates. Special purpose ‘summer catalyst’ for use in warmer shop environments.


  • Curing agent


  • Centrifugal casting,
  • Resin Transfer Molding