What is propellant in aerosol sprays?

Answer:
It's propane, or LPG (Liquified Propane Gas). It USED to be Chlorofloropropane or chlorofloromethane. Those where REALY good for you </sarcasm>. Breath it in and fluid would form in your loungs, and it decomposed ozone gas.

These days its usually an LPG (liquified petroleum gas) like propane or butane.

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