Liquefied petroleum gas is a colourless and odourless liquid which readily evaporates into a gas. In order to help detect leaks, an odorant (either Butane or Propane) has been added to LPG. It is classified as highly flammable and if it contains more than 0.1% Butadiene. LPG is non-corrosive but can dissolve lubricants, certain plastics...