Butane is a colorless, flammable gas that is part of the alkane family of hydrocarbons. It consists of four carbon atoms and ten hydrogen atoms, giving it the chemical formula C4H10. Butane is commonly used as a fuel in lighters, portable stoves, and as a propellant in aerosol sprays. In addition to its use as a fuel, butane can be found in natural gas and is often extracted during the refining of crude oil. It can be easily liquefied under pressure, making it convenient for storage and transportation. Butane is also used in the production of various chemicals and plastics.