What is Cyclopentane CAS 287-92-3?

Cyclopentane is a five-carbon cycloalkane with CAS 287-92-3, EINECS 206-016-6 and molecular formula C₅H₁₀. It is a colorless, highly volatile and flammable liquid.

What is Cyclopentane used for?

It is mainly used as a physical blowing agent in rigid polyurethane foam for refrigerators, freezers, water heaters, pipes and insulation panels. It is also used as a process solvent for resins and synthetic rubber and as a chromatography reference material.

How does Cyclopentane differ from linear pentane isomers?

Cyclopentane is a cyclic C5 hydrocarbon, while n-pentane and isopentane are linear or branched acyclic isomers. The cyclic structure changes boiling point, density and solvent or blowing-agent behavior, so the isomers are not interchangeable for every formulation.

What is the difference between foam-grade Cyclopentane 95% and 99%?

Foam-grade Cyclopentane 95% is commonly used for rigid polyurethane foam where cost and performance are balanced. Higher-purity 99% material has tighter limits for water, sulfur, benzene and other hydrocarbon impurities, which can improve consistency in critical insulation or solvent applications.

How should Cyclopentane be stored and handled?

Store it in tightly sealed containers or pressure-rated systems in a cool, dry, well-ventilated area below 25 °C, away from heat, sparks, flames and strong oxidizers. Use explosion-proof equipment and vapor controls because the flash point is very low.

Cyclopentane CAS 287-92-3

Cyclopentane, CAS 287-92-3, is a five-carbon cycloalkane used mainly as a physical blowing agent in rigid polyurethane foam for refrigerators, freezers, water heaters and insulation panels, and as a process solvent for resins and synthetic rubber. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 287-92-3
Synonyms: Pentamethylene, C-pentane, Cycloalkane
Einecs: 206-016-6
Molecular Formula: C₅H₁₀
Grade: Industrial grade 99%
Package: 200kg iron drum or 50kg plastic drum packing

Request a quote

Share:

Product Description

Cyclopentane, CAS 287-92-3, is pentamethylene, a five-carbon cycloalkane; the EC/EINECS number is 206-016-6.

Synonyms: Pentamethylene; C-pentane.

CAS: 287-92-3.

Molecular formula: C₅H₁₀.

Molecular weight: 70.13.

EC number: 206-016-6.

It is a colorless, highly volatile and flammable liquid with a gasoline-like odor; the melting point is about -94 °C, the boiling point about 49.3 °C and the density about 0.75 g/cm³.

It has a flash point below -37 °C.

It is practically insoluble in water and miscible with most organic solvents.

It is used mainly as a physical blowing agent in rigid polyurethane foam for refrigerators, freezers, water heaters, pipes and insulation panels.

It is used as a process solvent for resins and synthetic rubber.

It is used as a chromatography reference material.

It differs from n-pentane and isopentane in ring structure, boiling point, density and blowing-agent behavior; confirm the correct isomer for the formulation.

Confirm assay, water, sulfur, benzene and other hydrocarbon impurities; select the 95% or 99% foam grade as required.

Store in tightly sealed or pressure-rated containers in a cool, dry, well-ventilated area below about 25 °C, away from heat, sparks, flames and strong oxidizers; use explosion-proof equipment and vapor controls.

Confirm the current product-specific specification.

Confirm packaging with the requested quantity and destination requirements.

Document requirements should be confirmed from the current specification, SDS, COA, or other product-specific files.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended use, required specification, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Cyclopentane CAS 287-92-3?

A: Cyclopentane is a five-carbon cycloalkane with CAS 287-92-3, EINECS 206-016-6 and molecular formula C₅H₁₀. It is a colorless, highly volatile and flammable liquid.
Q:
What is Cyclopentane used for?

A: It is mainly used as a physical blowing agent in rigid polyurethane foam for refrigerators, freezers, water heaters, pipes and insulation panels. It is also used as a process solvent for resins and synthetic rubber and as a chromatography reference material.
Q:
How does Cyclopentane differ from linear pentane isomers?

A: Cyclopentane is a cyclic C5 hydrocarbon, while n-pentane and isopentane are linear or branched acyclic isomers. The cyclic structure changes boiling point, density and solvent or blowing-agent behavior, so the isomers are not interchangeable for every formulation.
Q:
What is the difference between foam-grade Cyclopentane 95% and 99%?

A: Foam-grade Cyclopentane 95% is commonly used for rigid polyurethane foam where cost and performance are balanced. Higher-purity 99% material has tighter limits for water, sulfur, benzene and other hydrocarbon impurities, which can improve consistency in critical insulation or solvent applications.
Q:
How should Cyclopentane be stored and handled?

A: Store it in tightly sealed containers or pressure-rated systems in a cool, dry, well-ventilated area below 25 °C, away from heat, sparks, flames and strong oxidizers. Use explosion-proof equipment and vapor controls because the flash point is very low.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

Current Language

Change Language