C

Cyclopentane

IUPAC: cyclopentane

C5H10 Organic Compounds CAS 287-92-3
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Quick Reference
Formula / NotationC5H10
CAS Number287-92-3
Molecular Weight70.13
Melting Point-137 °F (USCG, 1999)
Boiling Point120.7 °F at 760 mmHg (USCG, 1999)
Density0.74 at 68 °F (USCG, 1999) - Less dense than water; will float
SolubilityInsoluble (NIOSH, 2024)
AppearanceCyclopentane appears as a clear colorless liquid with a petroleum-like odor. Flash point of -35 °F. Less dense than water and insoluble in water. Vapors are heavier than air.
Also Known AsPentamethylene; 287-92-3; ciclopentano; cyclopentan; Zyklopentan; T86PB90RNU; DTXSID6024886; NSC-60213; DTXCID804886; CHEBI:23492
CategoryOrganic Compounds

What is Cyclopentane?

Cyclopentane is a cycloalkane that consists of five carbons each bonded with two hydrogens above and below the plane. The parent of the class of cyclopentanes. It has a role as a non-polar solvent. It is a volatile organic compound, a cycloalkane and a member of cyclopentanes.

Formula & Notation

C5H10

IUPAC Name: cyclopentane

Other Names / Synonyms: Pentamethylene; 287-92-3; ciclopentano; cyclopentan; Zyklopentan; T86PB90RNU; DTXSID6024886; NSC-60213; DTXCID804886; CHEBI:23492

Properties & Characteristics

Appearance: Cyclopentane appears as a clear colorless liquid with a petroleum-like odor. Flash point of -35 °F. Less dense than water and insoluble in water. Vapors are heavier than air.. Molecular formula: C5H10. Molecular weight: 70.13 g/mol. Boiling point: 120.7 °F at 760 mmHg (USCG, 1999). Melting point: -137 °F (USCG, 1999). Density: 0.74 at 68 °F (USCG, 1999) - Less dense than water; will float. Solubility: Insoluble (NIOSH, 2024). Vapor pressure: 400 mmHg at 88 °F (NIOSH, 2024). LogP: 3.

Physical Data

PropertyValue
Melting Point-137 °F (USCG, 1999)
Boiling Point120.7 °F at 760 mmHg (USCG, 1999)
Density0.74 at 68 °F (USCG, 1999) - Less dense than water; will float
Molecular Weight70.13
SolubilityInsoluble (NIOSH, 2024)
AppearanceCyclopentane appears as a clear colorless liquid with a petroleum-like odor. Flash point of -35 °F. Less dense than water and insoluble in water. Vapors are heavier than air.

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Cyclopentane
Formula C5H10
CAS Number 287-92-3
Molecular Weight 70.13
Synonyms Pentamethylene; 287-92-3; ciclopentano; cyclopentan; Zyklopentan; T86PB90RNU; DTXSID6024886; NSC-60213; DTXCID804886; CHEBI:23492

Frequently Asked Questions

Cyclopentane is a cycloalkane that consists of five carbons each bonded with two hydrogens above and below the plane. The parent of the class of cyclopentanes. It has a role as a non-polar solvent. It is a volatile organic compound, a cycloalkane and a member of cyclopentanes.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.