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VA-061 Azo Initiator

VA-061 Azo Initiator


  • non-nitrile azo initiator
  • soluble in acidic aqueous solution potential for polymerization in water system non-halogen using organic acid like acetic acid.
  • 10 hour half-life decomposition temperature, 61 degree C (approx. 45 degree C under condition of acidic aqueous solution)

Chemical Name


CAS NO. 20858-12-2
Molecular weight = 250.35


Appearance slight pale yellow crystalline powder
Melting point 115-125°C
Activation energy 1.14X105J/mol
10 hour half-life decomposition temperature 61°C(in methanol)
Solubility freely in methanol ( soluble in acidic aqueous solution, slightly soluble in water)
insoluble intoluene or hexane

Packaging and Storage Condition

  • 5kg in cardboard
  • Keep under 10°C

Related Regulations and Safety Data

TSCA inventory listed
EINECS No. 244-085-4
Law concerning the Examination and Regulation of Manufacture, etc. of Chemical Substances existing chemical substances 5-5870
Occupational Health and Safety Law 8-(2)-1271
Mutation data mutagenicity test using microbe weak positive
Oral toxicity data
rat and above 2000mg/kg
Irritation data -