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Azobisisobutyronitrile
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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.
Quick Facts Names, Identifiers ...
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Names | |
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IUPAC name
2,2′-Azobis(2-methylpropionitrile), 2-(azo(1-cyano-1-methylethyl))-2-methylpropane nitrile | |
Other names
Azobisisobutyronitrile Azobisisobutylonitrile AIBN | |
Identifiers | |
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3D model (JSmol) |
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Abbreviations | AIBN |
ChemSpider |
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ECHA InfoCard | 100.001.030 ![]() |
EC Number |
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PubChem CID |
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RTECS number |
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UNII | |
UN number | 3234 1325 |
CompTox Dashboard (EPA) |
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Properties | |
C8H12N4 | |
Molar mass | 164.21 g/mol |
Appearance | white crystals |
Density | 1.1 g cm−3 |
Melting point | 103 to 105 °C (217 to 221 °F; 376 to 378 K) |
poor | |
Hazards | |
GHS labelling: | |
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Warning | |
H242, H302, H332, H412 | |
P210, P220, P234, P261, P264, P270, P271, P273, P280, P301+P312, P304+P312, P304+P340, P312, P330, P370+P378, P403+P235, P411, P420, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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As an azo initiator, radicals resulting from AIBN have multiple benefits[1] over common organic peroxides. For example, they do not have oxygenated byproducts or much yellow discoloration. Additionally, they do not cause too much grafting and therefore are often used when making adhesives, acrylic fibers, detergents, etc.