V-601 is a non-nitrile azo initiator having a high decomposition temperature. It is freely soluble in various organic solvents and has a 10 hour half-life decomposition temperature of 66° C.

It can be used as an alternative to V-60 (AIBN) as it has an equivalent polymerization activity which rises in alcohol solvents.

Chemical Name

Dimethyl 2,2'-azobis(2-methylpropionate)

CAS No.: 2589-57-3
Molecular weight: 230.26

Physical characteristics

Appearance Slightly yellow or light yellow crystals or oily liquid
Melting/freezing point 22-28° C
10 hour half-time decomposition temperature 66° C in toluene
Activation energy 131.2 KJ/mol K
Frequency factor (ln A) 35.67
Solubility Freely soluble in benzene, ethanol, DMF, dioxane and DMSO
Soluble in methanol, toluene, chloroform, hexane and acid
Insoluble in water
Self-accelerating decomposition temperature (SADT) 35° C


Main Applications

  • Acrylic resins for paints and coatings
  • Coating polymers for packaging
  • PMMA and pressure-sensitive adhesives


  • EINECS No.: 219-976-6
  • REACH: n/a


Store under 10°C in a well-ventilated position. Protect from heat and direct sunlight. Do not seal container gastight. Store only in the original container.

Safety information

Health Hazard
Serious Health Hazard

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