Acetonitrile
Solvent Properties

CAS 75-05-8


Physical Properties  
Molecular weight 41.05
Boiling point 81.60°C
Vapor pressure 88.8 Torr at 25°C
Freezing point -43.8°C
Refractive index 1.3441 at 20°C
Density 0.7822 g/mL (6.527 lb/gal) at 20°C
  0.7766 g/mL (6.481 lb/gal) at 25°C
Dielectric constant 37.5 at 20°C
Dipole moment 3.44 D at 20°C
Solvent group 6
Polarity index (P') 5.8
Eluotropic value on alumina 0.65
Eluotropic value on octadecylsilane 3.1
Eluotropic value on silica 0.52
Viscosity 0.38 cP at 15°C
Surface tension 19.10 dyn/cm at 20°C
Solubility in water Miscible in all proportions
   
Regulatory and Safety Data  
DOT Hazard Class 3, Flammable Liquid
Packing Group II
UN Identification Number UN1648
   
Storage Store in an area designed for flammable storage, or an approved metal cabinet, away from direct sunlight and sources of heat and ignition.
   
EPA applicable waste code(s) D001, U003
Flash Point 42°F (6°C) by closed cup
Lower explosive limit 3.0%
Upper explosive limit 16.0%
Time Weighted Average 40ppm ACGIH

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