In productions of sprays the most common propellant used is propane
GASES INVOLVED
Propane (C3H8): it is usually contained in big tanks for ordinary production.
EXPECTED RISKS
C3H8: used as a fuel, LPG is a mixture of propane and butane, which is often odorized by ethantiol to make its detection easier in case of leaks. It can easily form an atmosphere with high risk of explosion.