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Cycloheptane
General
Molecular formula	C7H14
SMILES	C1CCCCCC1
Molar mass	98.19 g/mol
Appearance and smell	Colourless liquid, greasy smell or petroleum
CAS number	[291-64-5]
Properties
Density and phase	0.8110 g/cm3
Solubility in water	Immiscible
Solubility in ethanol	Miscible
Melting point	-12 °C
Boiling point	118.4 °C
Viscosity
Index of refraction, ''n''D
Hazards
EU classification	Flammable ('F') Harmful ('Xn') Dangerous for the environment ('N') Severe eye irritant, may cause corneal clouding
Flash Point	6 °C
NFPA 704
Related compounds
Related cycloalkanes	Cyclohexane Cyclooctane
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

'Cycloheptane' is a cycloalkane with the molecular formula C₇H₁₄. Cycloheptane is used as a nonpolar solvent for the chemical industry and as an intermediate in the manufacture of chemicals and pharmaceutical drugs. It may be derived by Clemmensen reduction from cycloheptanone. Cycloheptane vapour is irritating to the eyes and may cause respiratory depression if inhaled in large quantity.