The term is widely used to describe two prominent members of a family of light hydrocarbons called natural gas liquids (ngls): propane(c3h8)andbutane(c4h10). In nigeria lpg as a composition of 85% butane to 15% propane (industrystandard).

The term liquefied gas may seem like a contradiction in terms since all things in nature are liquid, solid and gas. Yet, liquidity is the unique character of lpg that makes it such a popular and widely used fuel. At normal temperature and pressure, lpg is gaseous. It changes to liquid when subjected to modest pressure or cooling. Lpg is a portable, clean, sustainable and efficient energy source which is readily available to consumers around the world.