Acrylonitrile

CAS RN:107-13-1

Reactivities / Incompatibilities

Strong oxidizers, acids and alkalis; bromine; amines. [Note: Unless inhibited (usually with methylhydroquinone) may polymerize spontaneously or when heated or in presence of strong alkali. Attacks copper.]

Explosive polymerization may occur on storage with silver nitrate. Potentially explosive reactions with benzyltrimethylammonium hydroxide + pyrrole, tetrahydrocarbozole + benzyltrimethylammonium hydroxide. Violent reactions with strong acids (e.g., nitric or sulfuric), strong bases, azoisobutyronitrile, dibenzoyl peroxide, di-tert-butylperoxide, or bromine.

... Very reactive and polymerizes violently in the presence of strong bases. ... May polymerize spontaneously, particularly in the absence of oxygen or on exposure to light.

Incompatible with AgNO3 /silver nitrates/ and amines.

Contact of strong acids (nitric or sulfuric) with acrylonitrile may lead to vigorous reactions. ... Contamination of a drum of acrylonitrile by nitric acid residue in the filling hose led to a slowly accelerating polymerisation reaction which burst the drum after 10 days.

Acrylonitrile polymerises violently in contact with strong bases, whether stabilised or unstabilised. Alkaline hydrolysis of acrylonitrile is exothermic and violent, especially when the temperature is above 60 deg C, the pressure is above atmospheric, and when heating at 60 deg C is prolonged above 10 mins. Polymerisation does not induce a violent reaction at 40-50 deg C at a concentration of 3% of sodium hydroxide in water.

Bromine was being added in portions to acrylonitrile with ice cooling, with intermediate warming to 20 deg C between portions. After half the bromine was added, the temperature increased to 70 deg C; then the flask exploded.

Acrylonitrile containing undissolved solid silver nitrate is liable, on long standing, to polymerise explosively and ignite. This was attributed to the slow deposition of a thermally insulating layer of polymer on the solid nitrate, which gradually gets hotter and catalyses rapid polymcrisation.

Forms explosive mixture with air. Reacts violently with strong acids, strong alkalis, bromine, and tetrahydrocarbazole. Copper, copper alloys, ammonia and amines may cause breakdown to poisonous products.

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