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Sigma-Aldrich Acetonitrile
Synonym Methyl cyanide Beilstein Registry 741857
Molecular Formula CH3CN EG/EC Number 2008352
Molecular Weight 41.05 MDL Number MFCD00001878
CAS Number 75-05-8 Vapor Pressure 72.8 mm Hg (20°C)
Density 0.786 g/mL at 25ºC Dielectric Constant 36.64 at 20ºC
Boiling Point 81-82ºC Dipole Moment 3.924
Melting Point -48ºC UV cutoff 190 nm
Flash Point 5.5ºC Refractive Index 1.344 at 20ºC
Viscosity (cP)  0.369 at 25ºC Vapor Density 1.41 (vs. air)
RIDADR UN 1648 3/PG 2 Hazard Statements H225-H302 + H312 + H332-H319
Signal Word
Danger Precautionary Statements P210-P280-P305 + P351 + P338
  GHS02, GHS07
Acetonitrile Miscibility / Immiscibility Table