What is the difference between Butane and Propane gas?

 

Butane and Propane have slightly different properties, the most important to the
motor caravanner being the boiling point at atmospheric pressure. In other words, the
temperature at which it changes from being a liquid to being a gas. Butane will only
readily change to a gas above 0°C, so is generally suitable for the spring to autumn
motor caravanner. Propane, on the other hand, will become a gas down to -40°C and
therefore can be used in winter, or all year round if desired. In UK Propane is
generally sold in red cylinders, Butane in blue.

Read further information on Gas Safety here...