Agent Name

Azobis(isobutyronitrile)

CAS Number

78-67-1

Formula

C8-H12-N4

Major Category

Nitrogen Compounds

Synonyms

2,2'-Azobisisobutyronitrile; 2,2'-Azobis(2-methylpropanenitrile); 2,2'-Azobis(2-methylpropionitrile); 2,2'-Azobis(isobutyronitrile); 2,2'-Azodiisobutyronitrile; 2,2'-Dicyano-2,2'-azopropane; 2,2'-Dimethyl-2,2'-azodipropionitrile; AIBN; Aceto AZIB; Aivn; AZDH; Azobisisobutylonitrile; Azobisisobutyronitrile; ChKhZ 57; Genitron; Pianofor An; Poly-Zole AZDN; Porofor 57; Porofor N; Porophor N; Propanenitrile, 2,2'-azobis(2-methyl-; Propionitrile, 2,2'-azobis(2-methyl-; VAZO 64; Vazo; alpha,alpha'-Azodiisobutyric acid dinitrile; alpha,alpha'-Azodiisobutyronitrile; [ChemIDplus] UN3234

Category

Nitriles

Description

White solid; [ICSC] Fine white crystals; [MSDSonline]

Sources/Uses

Used as blowing agent (elastomers and plastics), catalyst (vinyl polymerizations), curing agent (unsaturated polyester resins), and fumigant (when heated); [HSDB]

Comments

Forms hydrogen cyanide in the body; [Merck Index] Decomposed by warming forming toxic fumes such as tetramethylsuccinonitrile and cyanide; May decompose explosively from heating, shock, friction, or concussion; May cause CNS and liver effects; [ICSC] May form explosive mixture of dust in air; May self-decompose or self-ignite from heat, chemical reaction, or impact; [CAMEO] Effects in high-dose animal studies include toxicity to liver and kidneys; [eChemPortal: SIDSUNEP] Highly flammable; May explode from shock, friction, fire, or other source of ignition; May cause irritation; Targets the CNS, liver, and kidneys; [MSDSonline] See "NITRILES."

Exposure Assessment
Vapor Pressure

0.0067 mm Hg

Lethal Concentration

LC (rat) > 12,000 mg/m3/4h

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Self-reactive solid type C, temperature controlled."

Flammability (NFPA)

3: May ignite at ambient temperature

Adverse Effects
Hepatotoxin

Hepatotoxin, Secondary

Nephrotoxin

Yes

Other Poison

Chemical Asphyxiant

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure: