Azobisisobutyronitrile CAS 78-67-1

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What is Azobisisobutyronitrile and what is it used for?

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.

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Azobisisobutyronitrile Cas 78-67-1

Azobisisobutyronitrile CAS 78-67-1
Azobisisobutyronitrile CAS 78-67-1

Azobisisobutyronitrile Cas 78-67-1 product information:

Product Name: 2,2′-Azobis(2-methylpropionitrile)
Synonyms: A,A’-AZOISOBUTYRONITRILE;AIBN;ALPHA,ALPHA’-AZOBISISOBUTYRONITRILE;ALPHA,ALPHA-AZOBISISOBUTYRONITRILE;ALPHA,ALPHA’-AZO-DI-ISO-BUTYRONITRILE;ALPHA,ALPHA’-AZOISOBUTYRONITRILE;2,2′-dicyano-2,2′-azopropane;2,2′-Dimethyl-2,2′-azodipropionitrile
CAS NO: 78-67-1
EINECS: 201-132-3
Molecular Formula: C8H12N4
Molecular Weight: 164.21
Melting point: 102-104 °C (dec.)(lit.)
Boiling  Point: 281.68°C (rough estimate)
Appearance: white solid
Storage: 2-8°C
Solubility: Insoluble in water
Applications: 1. Organic synthesis intermediates
2. Used as an initiator for high molecular weight polymers
3. Catalyst for methacrylate-embedded tissue.
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Preparation of 2,2′-azobis(2-methylpropionitrile):

2,2′-Azobis(2-methylpropionitrile), which is used as a foaming agent and a radical polymerization initiator, is produced in a high yield and a high purity, by (1) subjecting a crude 2-amino-2-methylpropionitrile product obtained by the reaction between acetone cyanohydrin and ammonia, to reduced pressure distillation, (2) contacting the resulting purified 2-amino-2-methylpropionitrile product having an ammonia content of 1.5% by weight or less with an aqueous metal hypochlorite solution, and then (3) treating the resulting aqueous suspension of 2,2′-azobis(2-methylpropionitrile) with a reducing agent.

What is 2,2′-Azobis(2-methylpropionitrile)?

2,2′-Azobis(2-methylpropionitrile) (AIBN) is a radical initiator. AIBN solution can be used to initiate radical-induced reactions, specifically free-radical polymerizations. It can be used in:Synthesis of styrene-vinyl pyridine diblock copolymers by reversible addition-fragmentation chain transfer (RAFT) polymerization.Preparation of silicon oxycarbide glasses.Synthesis of poly [N-(p-vinyl benzyl) phthalimide] for the preparation of titanium dioxide composites for electrophoretic displays.

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