pure form propylene glycol is approved for food and drug use and is very commonly found used in these products. It will work where as a more acceptable substitute.
Jesse, propolynen glycol, may be a better substitute,BUT,the FDA
approved it so many years ago, and now findings are that is toxic and
possibly cancer producing. BUT, is was ‘grandfathered’ and now cannot
be deemed a danger. If you look at virtually any thing in your
bathroom products, you will find it. You are possibly washing your
hair with radiator fluid! It is also in FOODS! It is in so many
products,If the FDA banned it…Proctor&Gamble would collapse.