(C₃H₈)  Propane

At room temperature and atmospheric pressure, propane is a colorless, flammable, nontoxic gas, with a characteristic natural gas odor. Propane is one of the group of liquefied petroleum gases. It is normally shipped in low pressure cylinders as a liquefied compressed gas under its own vapor pressure of 752 kPa (109 psig) at 21.1 degrees C.

• Propane is widely used as a fuel for suburban home heating systems and gas appliances. Propane is also used as a fuel for intraplant trucking where gasoline fumes are considered to be obnoxious. It is also used as a refrigerant gas and as a thermobulk fill for temperature and pressure control instruments. It has been used as a low temperature extraction solvent. It has been used extensively as a refrigerant in chemical, petroleum refining, and gas processing operations, and as a selective solvent for removing asphaltic components from the higher boiling fractions of crude oils.

• Commercial Preparation: Propane is a constituent of crude petroleum and natural gas. It is obtained there by refining and processing operations.

• Large amounts of propane can be stored underground in former salt mines. In addition to trucks, railcars, and ships, propane can also be transported by pipeline.

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