4,4'-Azobis(4-cyanopentanoic acid)
Appearance
Names | |
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Preferred IUPAC name
4,4′-[(E)-Diazenediyl]bis(4-cyanopentanoic acid) | |
Other names
4,4-Azobis(4-cyanovaleric acid); 4,4-Azobis(cyanovaleric acid); 4,4′-Azobis(4-cyanopentanoic acid); ABCVA; ACVA
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.018.305 |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
C12H16N4O4 | |
Molar mass | 280.284 g·mol−1 |
Appearance | White crystalline powder |
Melting point | 118 to 125 °C (244 to 257 °F; 391 to 398 K) |
Soluble | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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4,4′-Azobis(4-cyanopentanoic acid) (ACPA) is a free radical initiator used in polymer synthesis.[1] ACPA is a water-soluble initiator used in both heterogeneous and homogeneous free-radical polymerizations. It is used as an initiator in reversible addition−fragmentation chain transfer polymerization (RAFT). When heated to decomposition, c. 70 °C, it releases N2 and produces 2 equivalents of reactive radicals capable of initiating polymerization.
References
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