... inflammable and harfulless, used in UPR,plasticizer,surfactant,antifreeze,emulsifier,softener Propylene glycol (PG C3H8O2 ) is ... surfctant,emulsifying agent and demulsifying agent.It can also be used as mould inhibitor,rerigerant system,antifreeze ,coolant, ... ice inhibitor and moisture preserving agent for tobacco. Propylene GlycolClassification: ...