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2,2'-Azobis(2-methylpropionitrile)

CAS Number: 78-67-1

Chemical Formula: C8H12N4

Synonyms:

2,2-Azobsisobutyronitril

A,A'-AZOISOBUTYRONITRILE

ALPHA

Appearance: White crystal

HS Code: 29269090

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Product Details

Products Description of 2,2'-Azobis(2-methylpropionitrile) CAS#78-67-1

Azobisisobutyronitrile (abbreviated AIBN) is an organic compound with the formula [(CH3)2C(CN)]2N2. This white powder is soluble in alcohols and common organic solvents but is insoluble in water. It is often used as a foamer in plastics and rubber and as a radical initiator. It's soluble in a wide variety of organic solvents, including alcohol-based solvents. Insoluble in water and denser than water. Moderately toxic by ingestion. Readily ignited by sparks or flames. Burns intensely and persistently. Toxic oxides of nitrogen produced during combustion. Used as a catalyst, in vinyl polymerizations and a blowing agent for plastics.

Parameters

Melting point	102-104 °C (dec.)(lit.)
Boiling point	281.68°C (rough estimate)
density	1.11
vapor pressure	0.81Pa at 24.85℃
refractive index	n20/D1.495
Fp	4℃
storage temp.	2-8°C
solubility	Chloroform (Slightly), Methanol (Slightly)
form	Solid
color	Crystals from EtOH
Odor	odorless
Water Solubility	Insoluble
Merck	13,920
BRN	1708400
Stability:	Stability Flammable solid. Shock sensitive. Thermally unstable. May be explosive in combination with acetone or heptane. Incompatible with oxidizing agents.
InChIKey	OZAIFHULBGXAKX-VAWYXSNFSA-N
LogP	1.1 at 25℃
CAS DataBase Reference	78-67-1(CAS DataBase Reference)
NIST Chemistry Reference	2,2'-Azo-bis-isobutyronitrile(78-67-1)
EPA Substance Registry System	Azobis(isobutyronitrile) (78-67-1)

Safety Information

Hazard Codes	E,Xn,F,Xi
Risk Statements	2-11-20/22-52/53-67-65-48/20-38-63-66-36
Safety Statements	39-41-47-61-62-36/37-16-26
RIDADR	UN 3234 4.1
WGK Germany	2
RTECS	UG0800000
F	4.4
HazardClass	4.1
PackingGroup	II
HS Code	29269090
Hazardous Substances Data	78-67-1(Hazardous Substances Data)
Toxicity	LDLo orl-rat: 670 mg/kg 34ZIAG 0,117,69

Product Application of 2,2'-Azobis(2-methylpropionitrile) CAS#78-67-1

2,2'-Azobis(2-methylpropionitrile) serves as an initiator in radical polymerization of polymers, primarily due to its molecular structure that enables easy cleavage reactions and the formation of molecules with high activation energy. 2,2'-Azobis(2-methylpropionitrile) (AIBN) stands as the most widely used azo initiator. It is distinguished by its relatively stable decomposition reaction, which produces only a single type of free radical and barely induces any decomposition. For these reasons, it is frequently applied in the kinetic research of free radical polymerization.

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