Butane is an organic compound with the formula C4H10 that is an alkane. Normal butane can be used for gasoline blending, as a fuel gas, either alone or in a mixture with propane, and as a feedstock for the manufacture of ethylene and butadiene, a key ingredient of synthetic rubber. Isobutane is primarily used by refineries to enhance (increase) the octane number of motor gasoline.
Butane is also used as lighter fuel for a common lighter or butane torch and is sold bottled as a fuel for normal uses like cooking and camping.
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