Facts about Propane:

• Propane's chemical formula is C3H8.
• Propane gas is heavier than air, and will accumulate in low areas if released.
• The odor associated with propane is caused by a commercial odorant that is added to aid in leak detection.
• Although not poisonous, propane can be an asphyxiant if enough oxygen is displaced.
• Propane's flammability range in air is from 2.2% to 9.6%. Higher or lower concentrations in air will not burn.
• Propane is purchased and stored as a liquid under pressure.  When the pressure on the liquid is reduced, such as when the container valve is opened, a portion of the liquid changes to gas.
• Liquid propane will expand to 270 times its previous volume when changing to a gas.  This is 17 times greater than the water to steam expansion ratio.  Thus a small volume of liquid propane will convert to a large quantity of gas.
• Propane tanks should only be filled to 80% capacity with liquid to allow for the vapor expansions and contractions that occur with temperature changes.
• When changing from the liquid to gas state, propane can cause frostbite if it comes in contact with the skin.

Propane Safety Tips:

• Cylinders must be oriented so that the vapor space is in contact with the pressure relief valve.  This means the cylinder must be transported and stored in the upright position.
• During transport container outlets should be capped or plugged to prevent leaks in case of valve failure.
• Never test for propane leaks with an open flame such as a match or lighter.
• Do not store propane cylinders indoors, including in a garage.  Cylinders should be stored in a well ventilated place outdoors, off the ground, on a noncombustible surface, away from sources of ignition, and with outlet caps or plugs in place.
• Never use a damaged, corroded, or leaking cylinder.
• Keep propane grills and appliances clean and well maintained.  Keep grill lid open when lighting.
• If a fire occurs near a propane cylinder or tank, get at least 1000 feet away immediately.  Call the fire department and be sure to tell the dispatcher about the possibility of propane involvement.