propylene glycol has been used as the base for fog machine liquids and in nebulizers for decades.
One key ingredient of the stuff: propylene glycol, a synthetic liquid that absorbs water.
propylene glycol is used for a variety of industrial, cosmetic, and food production uses.
The major point is that we have no studies that show the safety of propylene glycol when inhaled over the long term.
That said, propylene glycol is different from the antifreeze used in cars, which is considered more toxic and not safe.
propylene glycol as a liquid, he told me, is “similar to antifreeze.”
propylene oxide is less toxic than ethylene oxide but is still highly toxic.
One drawback, common to both ethylene oxide and propylene oxide, is toxicity.
Insofar as ease of detonation is concerned, 1,2-butylene oxide has about 65 the same explosive limits as propylene oxide.
Tests have shown that, insofar as ease of detonation is concerned, 1,2-butylene oxide is similar to propylene 30 oxide.
propylene pro·pyl·ene (prō'pə-lēn')
A flammable gas derived from processing petroleum hydrocarbon and used in organic synthesis. Also called propene.