A highly flammable alicyclic hydrocarbon, colorless liquid with a petrol-like odor. Use as a blowing agent in the manufacture of polyurethane insulating foam. It is a substitute for HCFC.


Molar Weight70.15 g/mol
Melting Point-94 °C
Boiling Point50 °C
Flash Point−37 °C
Density0.751 g/ml at 25 °C
FormsLiquid, Flammable

Uses and Applications

Key applications

  • Blowing agent
  • Refrigerating and air-conditioning systems
  • Solvents


  • Polymers

Synonyms: Pentamethylene, Cyclopentane

Chemical Formula: C5H10

CAS Number: 287-92-3