Azo polymerization initiators


CAS : 39198-34-0

non-nitrile high-temperature type oil soluble

Plastics manufacturing


  • Non-nitrile type, Oil-soluble azo polymerization initiator
  • Generates polymerization active species consisting only of hydrocarbons
  • 10 Hour half-life decomposition temperature: 110℃(in dipheny ether)
Structural formula of 2,2'-Azobis(2,4,4-trimethylpentane)
Chemical name 2,2'-Azobis(2,4,4-trimethylpentane)
CAS RN® 39198-34-0
Molecular weight 254.4
Molecular formula C16H34N2

Physical characteristics

Crystal or liquid
Melting point/freezing point 23-24℃
10 hour hailf-life decomposition temperature 110℃(in diphenyl ether)
Activation energy 139.6 kJ/mol
Frequency factor (ln A) 33.02

toluene: soluble, water: insoluble methanol: slightly soluble

Decomposition temperature 98℃

Packaging & Storage conditions

Packaging 100g
Storage conditions keep under 10℃

Related laws and regulations

TSCA Not Listed
EINECS Not Listed
REACH Not Listed

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