Cyclopentane, also known as "pentamethylene", is a kind of cycloalkane with the formula of C5H10. It has a molecular weight of 70.13.It exists as a kind of flammable liquid. It is soluble in alcohol, ether and hydrocarbons and is not soluble in water.Cyclopentane is not a planar ring and has two conformations: envelope conformations and semi-chair conformations. It exhibits red yellow color when having reaction with fuming sulfuric acid while generating nitro cyclopentane and glutaric acid through reaction with nitric acid.
Cyclopentane as a new type of foam PU foam, used to replace the destruction of the atmospheric ozone layer of chlorofluorocarbons(CFCS),is now widely used in the production of fluorine-free refrigerator, freezer industry and cold storage,pipeline insulation and other fields, CFCs and HCFCs will soon be banned ad the ODS deadline is approached by the Montreal Convention, and cyclopentane will become the protagonist of the PU foaming field.
（1）Blowing Agent: Widely used in the production of polyurethane foam as an eco-friendly blowing agent, replacing chlorofluorocarbons (CFCs).
（2） Refrigerant: Used in household refrigerators and freezers as a refrigerant due to its lower ozone depletion potential.
（3）Organic Synthesis: Used as a reaction medium or solvent in certain organic chemical reactions.
（4）Laboratory Use: Employed in chemical synthesis and the separation of organic compounds in laboratory settings.
