butane

Butane () is an alkane with the formula C4H10. Butane exists as two isomers, n-butane, and iso-butane, . Both isomers are highly flammable, colorless, easily liquefied gases that quickly vaporize at room temperature and pressure. Butanes are a trace component of natural gases, which contain higher concentrations of other hydrocarbons such as propane, ethane, and especially methane. Liquefied petroleum gas is a mixture of propane and some butanes.

The name butane comes from the root but- (from butyric acid, named after the Greek word for butter) and the suffix -ane (for organic compounds).