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Butane (C4H10) is a straight-chain hydrocarbon extracted from natural gas and petroleum. It is a colorless alkane gas that boils at a temperature of 272.6K (31 °F). Under pressure, it can exist in liquid form at room temperature.[1][2][3]

Butane gas is sold bottled as a fuel for cooking and camping. When blended with Propane and other hydrocarbons, it is referred to commercially as LPG.