Propane is a three-carbon alkane gas (C3H8). It is stored under pressure inside a tank as a colorless, odorless liquid. As pressure is released, the liquid propane vaporizes and turns into gas that is used in combustion. C3H8 Uses (Propane) Propane is used in food additives. Used as a component in liquid petroleum gas. Used in the manufacturing of propylene and ethylene. Used as a fuel in cutting and welding operations. Used as a primary component for chemical synthesis. Used as a source of energy in motor vehicles, and water heaters. Used as improvised explosive devices. Used in lawn movers. Used in refrigeration. Used in the campaign. Used as an industrial fuel. Ankur Speciality Gases provide Propane gas with purity 99.5% for your usages.