4,4'-Azobis(4-cyanopentanoic acid)

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4,4'-Azobis(4-cyanopentanoic acid)
4,4'-Azobis(4-cyanovaleric acid).svg
IUPAC name
4-Cyano-4-(2-cyano-5-hydroxy-5-oxopentan-2-yl)diazenylpentanoic acid
Other names
4,4-Azobis(4-cyanovaleric acid); 4,4-Azobis(cyanovaleric acid); 4,4′-Azobis(4-cyanopentanoic acid); ABCVA; ACVA
2638-94-0 YesY
ChemSpider 83896 YesY
Jmol-3D images Image
PubChem 92938
Molar mass 280.28 g/mol
Appearance White crystalline powder
Melting point 118 to 125 °C (244 to 257 °F; 391 to 398 K)
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

4,4'-Azobis(4-cyanopentanoic acid) (ACPA) is a free radical initiator used in polymer synthesis. ACPA is a water soluble initiator used in both heterogeneous and homogenous free-radical polymerizations. It is used as an initiator in reversible addition−fragmentation chain transfer polymerization (RAFT). When heated to decomposition, ca. 70 °C , it releases N2 and produces 2 equivalents of reactive radicals capable of initiating polymerization.


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