Liquefied petroleum gas is a clear liquid that easily evaporates into gases and can dissolve lubricants. It is usually stored as a liquid and is used for heating, cooking and in vehicles, says the Health and Safety Authority. It is comprised of mostly butane and propane, says Cameo Chemicals. Liquefied petroleum gas can become dangerous if it leaks, as it will evaporate into the air. Because propane gas is heavier than air, it can travel long distances and can cause fires, says the Health and Safety Authority. It may cause cold burns to the skin. Liquefied petroleum gas must be stored in cylinders that are suited to store it, and if the liquefied petroleum gas container is exposed to heat for an extended period of time, it can cause explosions and rocket, says Cameo Chemicals.
Exposure to liquefied petroleum gas can cause dizziness or cardio-respiratory arrest in humans, and high concentrations can cause asphyxiation. In some cases, exposure to liquefied petroleum gas may cause euphoria, nerve and brain damage, hallucination or heart failure, according to Cameo Chemicals.