Pyridine
Solvent Properties

CAS 110-86-1


Physical Properties  
Molecular weight 79.10
Boiling point 115.25C
Vapor pressure 18 Torr at 25C
Freezing point -41.55C
Refractive index 1.5102 at 20C
Density 0.9832 g/mL (8.205 lb/gal) at 20C
  0.9782 g/mL (8.163 lb/gal) at 25C
Dielectric constant 12.4 at 20C
Dipole moment 2.37 D at 25C
Solvent group 3
Polarity index (P') 5.3
Eluotropic value on alumina 0.71
Viscosity 0.95 cP at 20C
Surface tension 36.88 dyn/cm at 20C
Solubility in water Miscible in all proportions
   
Regulatory and Safety Data  
DOT Hazard Class 3, Flammable Liquid
Packing Group II
UN Identification Number UN1282
   
Storage Store in an area designed for flammable storage, or in an approved metal cabinet, away from direct sunlight, heat and sources of ignition.
   
EPA applicable waste code(s) U196, F005, D038
Flash point 68F (20C) by closed cup
Lower explosive limit 1.8%
Upper explosive limit 12.4%
Time Weighted Average 5 PPM ACGIH