Propane (also called LPG-liquefied petroleum gas-or LP gas) is a widely used fuel. It is transported and stored as a very cold liquid and can cause a “freeze burn” or frostbite if it contacts the skin. The liquid propane is turned into a gas inside a tank or a cylinder. In its natural form, propane is colorless and odorless. To make propane easier to detect in the event of a leak or spill, manufacturers deliberately add a chemical compound to give it a distinctive smell.
Propane is flammable when mixed with air (oxygen) and can be ignited by many sources including; open flames, smoking materials, electrical sparks, and static electricity.
Propane vapors are heavier than air. For this reason, they may accumulate in low-lying areas such as: basements, crawl spaces, and ditches, or along floors. However, air currents can sometimes carry propane vapors elsewhere within a building.