• It is colorless and cannot be seen.
  
  
• It is odorless. Hence LPG is odorized by adding an odorant prior to supply to the user, to aid the detection of any leaks.
  
  
• It is slightly heavier than air and hence if there is a leak it flows to lower lying areas.
  
  
• In liquid form, its density is half that of water and hence it floats initially before it is vaporized.
  
  
• It is non-toxic but can cause asphyxiation in very high concentrations in air.

LPG expands upon release and 1 liter of liquid will form approximately 250 liters of vapor.