Butane

Butane is the largest straight-chain hydrocarbon to be a gas at room temperature. (Pentane boils at 36 C) It is also the smallest straight-chain hydrocarbon to have a branched isomer, called Isobutane. It was discovered in 1849. It is also called Tetracarbane (not recommended by the IUPAC), Butyl Hydride, and Quartane. It is used in lighters.