Tetrahydrofuran
Solvent Properties

CAS 109-99-9


Physical Properties  
Molecular weight 72.11
Boiling point 66C
Vapor pressure 142 Torr at 20C
Freezing point -108.5C
Refractive index 1.4072 at 20C
Density 0.888 g/mL (7.41 lb/gal) at 20C
  0.881 g/mL (7.35 lb/gal) at 25C
Dielectric constant 7.58 at 25C
Dipole moment 1.75 D at 25C
Solvent group 3
Polarity index (P') 4.0
Eluotropic value on alumina 0.45
Eluotropic value on octadecylsilane 3.7
Viscosity 0.55 cP at 20C
Surface tension 26.4 dyn/cm at 25C
Solubility in water Miscible in all proportions
   
Regulatory and Safety Data  
DOT Hazard Class 3, Flammable Liquid
Packing Group II
UN Identification Number UN2056
   
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) U213, D001
Flash point 6F (-14C) by closed cup
Lower explosive limit 2%
Upper explosive limit 11.8%
Time Weighted Average 200 ppm ACGIH
Peroxide hazard Check for presence of peroxides before concentrating