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A gaseous alkane obtained either from the gaseous fraction of crude oil or by the cracking of heavier fractions. The principal use of propane is as a fuel for heating and cooking, since it can be liquefied under pressure, stored in cylinders, and transported easily. Propane is the third member of the homologous series of alkanes.

propane: A colourless gaseous hydrocarbon,C3H8; m.p. –190°C; b.p.–42°C. It is the third member of thealkane series and is obtained from petroleum. Its main use is as bottledgas for fuel.