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Cyclopentane

Cyclopentane

IUPAC name	Cyclopentane
Other names	pentamethylene
Identifiers
CAS number	287-92-3
RTECS number	GY2390000
SMILES	C1CCCC1
Properties
Molecular formula	C₅H₁₀
Molar mass	70.1 g/mol
Appearance	clear, colorless liquid
Density	0.751 g/cm³
Melting point	−94 °C
Boiling point	49 °C
Acidity (pK_a)	~45
Related Compounds
Related compounds	cyclopropane, cyclobutane, cyclohexane
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Cyclopentane is a highly flammable alicyclic hydrocarbon with chemical formula C₅H₁₀ and CAS number 287-92-3, consisting of a ring of five carbon atoms each bonded with two hydrogen atoms above and below the plane. It occurs as a colorless liquid with a petrol-like odor. Its melting point is −94 °C and its boiling point is 49 °C. Cyclopentane is used in the manufacture of synthetic resins and rubber adhesives. The United States produces more than half a million kilograms of this chemical per year.