butane

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A component of natural gas, butane is usually combined with propane to make liquid propane gas, which is sold in metal containers of various sizes and is used in camping stoves, portable burners, or outdoor grills. Butane is a unique product in that it is easily compressed into liquid form that can be contained, yet when it is released into the air it turns into a highly flammable gas. It is often used as a performance-booster additive in gasoline, and as fuel for personal cigarette lighters.

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"Butane jets and hot air, September 5, 2012" by Sudharsan.Narayanan is licensed under CC BY.