Propane vs. Butane — What's the Difference?

Propane () is a three-carbon alkane with the molecular formula C3H8. It is a gas at standard temperature and pressure, but compressible to a transportable liquid.

Butane () or n-butane is an alkane with the formula C4H10. Butane is a gas at room temperature and atmospheric pressure.

A colorless gas, C3H8, found in natural gas and petroleum and widely used as a fuel.

Either of two isomers of a gaseous hydrocarbon, C4H10, produced synthetically from petroleum and used as a household fuel, refrigerant, and aerosol propellant and in the manufacture of synthetic rubber.

(organic compound) An aliphatic hydrocarbon, C₃H₈, a constituent of natural gas.

(organic compound) A hydrocarbon (either of the two isomers of C₄H₁₀ n-butane, and 2-methyl-propane) found in gaseous petroleum fractions.

A heavy gaseous hydrocarbon, C3H8, of the paraffin series, occurring naturally dissolved in crude petroleum, and also made artificially; - called also propyl hydride.

The n-butane isomer only.

Colorless gas found in natural gas and petroleum; used as a fuel

An inflammable gaseous saturated hydrocarbon, C4H10, of the marsh gas, or paraffin, series.

Occurs in natural gas; used in the manufacture of rubber and fuels