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| Customization: | Available |
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| CAS No.: | 78-67-1 |
| Formula: | C8h12n4 |
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| Item | Information |
|---|---|
| IUPAC Name | 2,2'-Azobis(2-methylpropionitrile) |
| Other Common Names | Azobisisobutyronitrile; AIBN (universal abbreviation) |
| CAS Number | 78-67-1 |
| Molecular Formula | C8H12N4 |
| Molecular Weight | 164.21 g/mol |
| Structural Formula | |
Appearance: White crystalline powder (often with a faint odor).
Melting Point: Decomposes around 102-104°C.
| Item | Specification |
| Appearance | White Crystal powder |
| Content | ≥99.0% |
| Melting Point | 100~103ºC |
| Volatility | ≤0.1% |
| Insoluble in meoh | ≤0.01% |
| Visible particle | ≤10SPECKS/10G |
| Iron(Fe) | ≤2ppm |
1. Chemical Nature & Main Category
It is an organic azonitrile compound and one of the most widely used azo initiators.
Category: Free-Radical Polymerization Initiator.
2. Mechanism of Action
AIBN undergoes homolytic cleavage upon heating (typically 60-80°C), decomposing to generate nitrogen gas and two 2-cyanoprop-2-yl free radicals.
These highly reactive carbon-centered free radicals initiate the chain reaction for free-radical polymerization.
3. Primary Industrial & Laboratory Uses
Polymer Industry: The dominant use. Initiates the polymerization of monomers like vinyl chloride, acrylates, methacrylates, styrene, acrylonitrile, etc., to produce plastics, resins, synthetic rubbers, and acrylic fibers.
Organic Synthesis: As a free-radical source for various reactions (e.g., brominations, reductions, cyclizations).
Foaming Agent: In some contexts, the nitrogen gas released during its decomposition can be used to create closed-cell foams (though less common than dedicated foaming agents).
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