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

4,4′-Azobis(4-cyanopentanoic acid)

Names
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
Identifiers
CAS Number	2638-94-0 Y
3D model (JSmol)	Interactive image
ChemSpider	83896 Y
PubChem CID	92938
InChI InChI=1S/C12H16N4O4/c1-11(7-13,5-3-9(17)18)15-16-12(2,8-14)6-4-10(19)20/h3-6H2,1-2H3,(H,17,18)(H,19,20)/b16-15+ Y Key: VFXXTYGQYWRHJP-FOCLMDBBSA-N Y
SMILES CC(CCC(=O)O)(C#N)N=NC(C)(CCC(=O)O)C#N
Properties
Chemical formula	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)
Solubility in water	Soluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

Tracking categories (test):

• SizeSet

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 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.