Definition: Propylene glycol (PG) is a colorless, nearly odorless, syrupy liquid that is derived from natural gas. It is used in dozens of products that you commonly use around your house.
It is used in food cake mixes, salad dressings, soft drinks, popcorn, food colorings, fat-free ice cream and sour cream. It also protects food from freezing, and helps as a preservative
In toiletries and cosmetics Lotions, creams, some baby wipes (not in my brand though), shampoos, antiperspirants, cosmetics, lipstick, lubricants
In other household items Room deodorizers, cleaners, sanitizers
And specific to the soap making and toiletry making industry, it is also used as a carrier in fragrance oils and in many melt and pour soap bases.

