V-50 is a cationic azo initiator having a low decomposition temperature. It is soluble in water and has a 10 hour half-life decomposition temperature of 56° C.

V-50 can be applied for superabsorbent polymers and polymer coagulants.

Chemical Name


CAS No.: 2997-92-4
Molecular weight: 271.19

Physical characteristics

Appearance Nearly white granules
Melting/freezing point 160-169° C
10 hour half-time decomposition temperature 56° C in water
Activation energy 123.4 KJ/mol K
Frequency factor (ln A) 34.23
Solubility Freely soluble in water
Insoluble in methanol, ethanol, acetone, DMF and dioxane
Self-accelerating decomposition temperature (SADT) 110° C


Main Applications

  • Acrylic emulsion, adhesives and emulsion polymerization
  • Finishing agents for textile and wool
  • Flocculants, dispersions and resists
  • Super absorbent polymers
  • Water and oil repellents
  • PVF dispersion
  • Ion exchange membrane


  • EINECS No.: 221-070-0
  • REACH: 01-2119987319-20-0000


Store under 40°C. Provide sufficient ventilation. Only packaging which is approved (e.g. acc. to ADR) may be used.

Safety information

Health Hazard
Hazardous to the Environment

For specific information on the safe handling of the product, please refer to the material safety data sheet (MSDS) which is available on request.