Cyclopentane 95+%, CAS 287-92-3

Cyclopentane, also known as “pentamethylene”, is a kind of naphthenic hydrocarbon with molecular formula C5H10. CAS Number is 287-92-3.Molecular weight 70.13. Flammable liquid. Melting point – 94.4 ℃, boiling point 49.3 ℃, relative density 0.7460, refractive index 1.4068. Soluble in alcohol, ether and hydrocarbon, insoluble in water. Cyclopentane is not a planar ring, but has two kinds of conformation: envelope conformation and semi-chair conformation. The carbon-carbon-carbon bond angle is close to 109 ° 28 ′, the molecular tension is small, and the ring is relatively stable. Cyclopentane is the most potential polyurethane foaming agent to replace CFC-11 refrigerator.

Product Detail

Product Tags

Physical Properties

Appearance Colorless Transparent Liquid
Molecular formula C5H10
Molecular weight 70.133
Density 0.751±0.1g/ml
Boiling point 49.2±0.0 °C at 760 mmHg
Flash point -37.2±0.0 °C
Melting point -94 °C
LogP 2.82
Vapor pressure 314.1±0.0 mmHg at 25°C
Refractive index 1.433
Stability 1. Stable
2. Prohibited substances: strong oxidant, strong acid, strong alkali, halogen
3. Polymerization hazard No polymerization
Saturated vapor pressure (KPa) 45(20℃)
Combustion heat (KJ/mol) -3287.8
Critical temperature (℃) 238.6
Critical pressure (MPa) 4.52
Ignition temperature (℃) 361
Upper explosion limit (%) 8.7
Lower explosive limit (%) 1.1
Solubility Insoluble in water, soluble in ethanol, ether, benzene, carbon tetrachloride, acetone and other organic solvents

Packaging, storage and transportation

Cyclopentane is usually transported in ISO Tank or in closed iron bucket, with the packaging specification of 16000kg-17000kg/ISO Tank and 150Kg/bucket.

Store cyclopentane in a cool place. Keep the container tightly closed and store in a dry and ventilated place.

Open containers must be carefully resealed and kept upright to prevent leakage.



Cyclopentane is a five-carbon cyclic hydrocarbon that is used as a building block in the production of various chemicals and materials. Some common uses of cyclopentane include:

Solvents: Cyclopentane is used as a solvent in the paint, adhesive, and resin industries due to its low toxicity, high boiling point, and low flammability.

Polymerization: Cyclopentane is used as a comonomer in the production of polymers such as polyvinyl chloride (PVC) and polystyrene.

Pharmaceuticals: Cyclopentane is used as an intermediate in the synthesis of certain pharmaceuticals and agrichemicals.

Refrigerants: Cyclopentane is used as a blowing agent in the production of polyurethane foams and as a refrigerant in mobile air conditioning systems.

Fragrances: Cyclopentane is used as a raw material in the synthesis of fragrances and flavors.

Cyclopentane is a versatile chemical that is widely used in a variety of industrial and commercial applications.

  • Previous:
  • Next:

  • Write your message here and send it to us