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

Synonym(s):4,4′-Azobis(4-cyanopentanoic acid);ABCVA;ACVA

CAS NO.：2638-94-0
Empirical Formula: C12H16N4O4
Molecular Weight: 280.28
MDL number: MFCD00002799
EINECS: 220-135-0
SAFETY DATA SHEET (SDS)
Update Date: 2026-04-24 14:57:00

4,4'-Azobis(4-cyanovaleric acid) Structural

What is 4,4'-Azobis(4-cyanovaleric acid)?

Chemical properties

white crystalline powder

The Uses of 4,4'-Azobis(4-cyanovaleric acid)

4,4'-Azobis(4-cyanovaleric acid) is used as a free radical imitator in polymer synthesis such as polyvinyl chloride, polyacrylonitrile, polyvinyl alcohol and synthetic fibers. It is utilized for both heterogeneous and homogenous free-radical polymerizations, and as an initiator in reversible addition-fragmentation chain transfer polymerization (RAFT). It is also used as a blowing agent for plastics and elastomers.

The Uses of 4,4'-Azobis(4-cyanovaleric acid)

4,4’Azobis(4-cyanovaleric Acid) is a water soluble azo initiator usded in radical polymerization process of vinyls, acylamides, styrenes as well as other polymers.

The Uses of 4,4'-Azobis(4-cyanovaleric acid)

4,4′-Azobis(4-cyanovaleric acid) has been used in the preparation of polystyrene particles by polymerizing styrene in ethyl alcohol.

What are the applications of Application

4,4′-Azobis(4-cyanovaleric acid) is an azo initiator used in radical polymerization processes

Hazard

Toxic.

Flammability and Explosibility

Not classified

Biochem/physiol Actions

4,4′-azobis(4-cyanovaleric acid) is an azo-initiator that induces lipid peroxidation of sunflower oil.

Safety Profile

Moderately toxic byintraperitoneal route. When heated to decomposition itemits toxic vapors of NOx.

Properties of 4,4'-Azobis(4-cyanovaleric acid)

Melting point:	118-125 °C (dec.) (lit.)
Boiling point:	423°C (rough estimate)
Density	1.2464 (rough estimate)
refractive index	1.6081 (estimate)
storage temp.	2-8°C
solubility	DMSO (Slightly), Methanol (Slightly)
form	Solid
pka	3.98±0.10(Predicted)
color	White
Water Solubility	Soluble in water.
Sensitive	Light Sensitive
BRN	1729856
CAS DataBase Reference	2638-94-0(CAS DataBase Reference)
NIST Chemistry Reference	4,4'-Azo-bis(4-cyanopentanoic acid)(2638-94-0)
EPA Substance Registry System	4,4'-Azobis(4-cyanovaleric acid) (2638-94-0)

Safety information for 4,4'-Azobis(4-cyanovaleric acid)

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02
GHS Hazard Statements	H242:Self-reactive substances and mixtures; and Organic peroxides
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P234:Keep only in original container. P235:Keep cool. P240:Ground/bond container and receiving equipment. P370+P378:In case of fire: Use … for extinction. P403:Store in a well-ventilated place.