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Names | |||
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Preferred IUPAC name
Cyclopentane | |||
Other names
pentamethylene
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Identifiers | |||
3D model (JSmol)
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ChEBI | |||
ChemSpider | |||
ECHA InfoCard | 100.005.470 | ||
EC Number |
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PubChem CID
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RTECS number |
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UNII | |||
CompTox Dashboard (EPA)
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Properties | |||
C5H10 | |||
Molar mass | 70.1 g/mol | ||
Appearance | clear, colorless liquid | ||
Odor | mild, sweet | ||
Density | 0.751 g/cm3 | ||
Melting point | −93.9 °C (−137.0 °F; 179.2 K) | ||
Boiling point | 49.2 °C (120.6 °F; 322.3 K) | ||
156 mg·l−1 (25 °C)[1] | |||
Solubility | soluble in ethanol, acetone, ether | ||
Vapor pressure | 45 kPa (20 °C) [2] | ||
Acidity (pKa) | ~45 | ||
-59.18·10−6 cm3/mol | |||
Refractive index (nD)
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1.4065 | ||
Hazards | |||
Main hazards | Flammable[3] | ||
NFPA 704 |
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Explosive limits | 1.1%-8.7%[3] | ||
U.S. Permissible exposure limit (PEL) |
none[3] | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
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Infobox references | |||
Cyclopentane (also called C pentane) has a chemical formula C5H10. It is usually formed by cracking cyclohexane in the presence of high temperature and pressure.[4]