Safe or Not?
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. Some websites and natural product promoters argue that PG is a nasty, carcinogenic chemical that has been wrongly greenlighted by the FDA. The FDA, and others, say that their claims are completely unfounded - that PG is completely safe when used properly.
Propylene Glycol 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 (though not in the brand I have in my cabinet), shampoos, antiperspirants, cosmetics, lipstick, lubricants
In other household items – Room deodorizers, cleaners, sanitizers and yes, new "non-toxic" and "safe" automotive antifreezes
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.
Over the past few years, there has been a lot of controversy about propylene glycol. Many people immediately associate it with ethylene glycol, a common (and admittedly dangerous) ingredient in automotive antifreeze, and assign guilt by association. Others refer to MSDS tests where PG was tested in 100% concentrations. Even sand and salt have ominous sounding MSDS cautions at 100%. But in most products, especially in “leave on” applications like lotions and cosmetics, PG is only used in tiny percentages.
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