2,2'-Azobis(2-methylpropionitrile) CAS#78-67-1
Effective Radical Initiator: Widely used as a catalyst in vinyl polymerizations, enhancing polymer production efficiency.
Versatile Solubility: Soluble in alcohols and various organic solvents, making it suitable for multiple industrial applications.
Foaming Agent: Commonly employed as a foaming agent in plastics and rubber, improving material properties.
High Combustibility: Easily ignited by sparks or flames, making it highly effective in applications requiring controlled combustion or radical formation.
Azobisisobutyronitrile (AIBN) is an organic compound with the chemical formula [(CH3)2C(CN)]2N2. This white powder is soluble in alcohols and many common organic solvents but does not dissolve in water. It is commonly utilized as a foaming agent in plastics and rubber, as well as a radical initiator. AIBN is soluble in a variety of organic solvents, particularly alcohol-based ones, and is denser than water. It is moderately toxic when ingested and can be easily ignited by sparks or flames, burning intensely and persistently. Combustion of AIBN produces toxic nitrogen oxides. Additionally, it is used as a catalyst in vinyl polymerizations and as a blowing agent for plastics.
Parameters
Melting point | 102-104 °C (dec.)(lit.) |
Boiling point | 281.68°C (rough estimate) |
density | 1.11 |
vapor pressure | 0.81Pa at 24.85℃ |
refractive index | n20/D1.495 |
Fp | 4℃ |
storage temp. | 2-8°C |
solubility | Chloroform (Slightly), Methanol (Slightly) |
form | Solid |
color | Crystals from EtOH |
Odor | odorless |
Water Solubility | Insoluble |
Merck | 13,920 |
BRN | 1708400 |
Stability: | Stability Flammable solid. Shock sensitive. Thermally unstable. May be explosive in combination with acetone or heptane. Incompatible with oxidizing agents. |
InChIKey | OZAIFHULBGXAKX-VAWYXSNFSA-N |
LogP | 1.1 at 25℃ |
CAS DataBase Reference | 78-67-1(CAS DataBase Reference) |
NIST Chemistry Reference | 2,2'-Azo-bis-isobutyronitrile(78-67-1) |
EPA Substance Registry System | Azobis(isobutyronitrile) (78-67-1) |
Safety Information
Hazard Codes | E,Xn,F,Xi |
Risk Statements | 2-11-20/22-52/53-67-65-48/20-38-63-66-36 |
Safety Statements | 39-41-47-61-62-36/37-16-26 |
RIDADR | UN 3234 4.1 |
WGK Germany | 2 |
RTECS | UG0800000 |
F | 4.4 |
HazardClass | 4.1 |
PackingGroup | II |
HS Code | 29269090 |
Hazardous Substances Data | 78-67-1(Hazardous Substances Data) |
Toxicity | LDLo orl-rat: 670 mg/kg 34ZIAG 0,117,69 |
2,2'-Azobis(2-methylpropionitrile), commonly known as AIBN, is frequently used as an initiator in polymer radical polymerization. This is because its molecules can easily undergo cleavage reactions, leading to the formation of high-energy activation molecules. AIBN is the most widely used azo initiator, known for its stable decomposition reaction that produces only one type of free radical, with minimal induced decomposition. As a result, it is commonly applied in the kinetic study of free radical polymerization.
