Azo polymerization initiators


CAS : 2997-92-4

non-nitrile water soluble

Plastics manufacturing


V-50 is a highly active water-soluble azo polymerization initiator. A variety of polymerization applications can be expected. This product is uniquely characterized by the amidine group which is cationic. Cationic emulsions, latex, etc. can be synthesized easily and in a stable manner, therefore an excellent effect can be expected for emulsion polymerization of synthetic rubber, adhesives, etc.

  • Water-soluble cationic azo initiator
  • 10 Hour half-life decomposition temperature: 56℃(in water)
  • Used for the superabsorbent polymer and coagulant
structural formula of 2,2'-Azobis(2-methylpropionamidine)dihydrochloride
Chemical name 2,2'-Azobis(2-methylpropionamidine)dihydrochloride
CAS RN® 2997-92-4
Molecular weight 271.19
Molecular Formula C8H18N6·2HCl
Synonyms 2,2'-Azobis(2-amidinopropane)dihydrochloride; AAPH
2,2'-Azobis(isobutylamidine)dihydrochloride; AIBA
2,2'-Azobis(2-amidinopropane)dihydrochloride; ABAP, ABAH

Physical characteristics

nearly white
Melting point/freezing point 160-169(dec.) °C
10hour half-life decomposition temperature 56℃(in water)
Activation energy 123.4 kJ/mol
Frequency factor (ln A) 34.23

water : freely soluble.
methanol, ethanol, acetone, N,N-dimethylformamide, dioxane : practically insoluble.

SADT 110℃

*SADT: Self-accelerating decomposition temperature

Packaging & Storage conditions

Packaging 20kg / 5kg / 500g
Storage conditions keep under 40℃

Related laws and regulations

TSCA Listed
REACH 01-2119987319-20-0000

Here, you can calculate the ‘residue rate’, ‘decomposition reaction time’, and ‘temperature during the decomposition reaction’ of azo polymerization initiators.

Image of Azo Residue Rate Calculation Tool