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2,2′-Azobis(2-methylpropionitrile), commonly known as AIBN, is a highly effective free radical initiator widely used in polymer chemistry and organic synthesis. It decomposes upon heating to generate nitrogen gas and free radicals, initiating chain polymerization of monomers such as acrylics, styrene, and vinyl compounds.AIBN is known for its reliable decomposition profile, high reactivity, and ability to generate clean radicals, making it a preferred initiator in research labs and industrial polymer production.
High Initiation Efficiency – Generates stable free radicals for polymerization
Predictable Decomposition Temperature – Typically 60–70 °C range
Consistent Quality – Controlled manufacturing for reproducible performance
Low Impurity Content – Reduces side reactions and by-products
Versatile Use – Suitable for bulk, solution, suspension, and emulsion polymerizations
Custom Grades Available – Tailored for specific polymer systems
| Item | Specification |
| Appearance | White to off-white crystalline powder |
| Assay (GC) | ≥ 98.0% |
| Melting Point | 101–104 °C |
| Loss on Drying | ≤ 0.5% |
| Residue on Ignition | ≤ 0.1% |
| Freezing Point of Melt | ~101–104 °C |
Standard Packaging:
• 1 kg foil bag
• 5 kg / 10 kg fiber drums
Bulk Packaging: Upon request
OEM / Private Label: Supported
Transport Conditions: Follow ADR/IATA regulations for peroxides and radical initiators
2,2′-Azobis(2-methylpropionitrile) is a reactive initiator that decomposes at elevated temperatures, so safe handling is crucial:
Avoid direct heat contact — handle below decomposition temperature
Personal Protection: safety goggles, gloves, lab coat
Prevent friction & shock during handling
Proper ventilation in processing areas
Documentation: COA, MSDS, and Technical Data Sheets available upon request.
Q1: What does AIBN do?
AIBN is a free radical initiator used to start polymer chain reactions in the production of various plastics and resins.
Q2: Why choose AIBN over other initiators?
It has predictable decomposition temperature, efficient radical generation, and clean reaction profiles with minimal by-products.
Q3: Can AIBN be used in emulsion polymerization?
Yes — AIBN is compatible with bulk, solution, suspension, and emulsion polymerization systems.
Q4: Is documentation provided?
Yes — COA, MSDS, and TDS can be provided for quality and compliance checks.
Q5: How should AIBN be stored?
In a cool, dry place, away from heat and ignition sources, with original sealed packaging.
