768375

Azobisisobutyronitrile

12 wt. % in acetone

• Synonym(s): 2,2′-Azobis(2-methylpropionitrile) solution, radical initiator, α,α,′-Azoisobutyronitrile solution, AIBN solution
• Empirical Formula (Hill Notation): C₈H₁₂N₄
• CAS Number: 78-67-1
• Molecular Weight: 164.21
• MDL number: MFCD00013808
• UNSPSC Code: 12162002
• PubChem Substance ID: 329767372

Properties

• form: liquid
• concentration: 12 wt. % in acetone
• refractive index: n20/D 1.368
• density: 0.808 g/mL at 25 °C
• storage temp.: 2-8°C
• SMILES string: CC(C)(\N=N\C(C)(C)C#N)C#N
• InChI: 1S/C8H12N4/c1-7(2,5-9)11-12-8(3,4)6-10/h1-4H3/b12-11+
• InChI key: OZAIFHULBGXAKX-VAWYXSNFSA-N

Description

General description

Azobisisobutyronitrile (AIBN) is an azo-compound and is widely used as a free radical initiator. This compound has labile carbon-nitrogen covalent bond which undergoes homolytic scission under thermal, chemical or photochemical conditions producing free radicals. They are useful in many reactions like halogenation, polymerisation of vinyl monomers, grafting reactions, curing of rubbers and unsaturated polymers and cross-linking of polyolefins.

Application

• Used as an initiator in the synthesis of highly cross-linked Poly(divinylbenzene) (PDVB) polymers.
• Used as an initiator in the polymerization process of 2-hydroxyethyl methacrylate (HEMA).

Features and Benefits

Decomposes unimolecularly at good rates without much variation from one solvent to another.

Safety Information

• Pictograms: GHS02,GHS07
• Signal Word: Danger
• Hazard Statements: H225,H319,H336
• Precautionary Statements: P210 - P233 - P240 - P241 - P242 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Flam. Liq. 2 - STOT SE 3
• Target Organs: Respiratory system
• Supplementary Hazards: EUH044,EUH066
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 2
• Flash Point(F): 1.4 °F
• Flash Point(C): -17 °C