Glossary

Propylene glycol

11.16.21

also known as 1,2-propanediol, is a synthetic (i.e., man-made) alcohol that attracts/absorbs water.

It is a viscous, colorless liquid, which is nearly odorless but possesses a faintly sweet taste. Propylene glycol is one of the most widely used ingredients in cosmetics and personal care products, including facial cleansers , moisturizers , bath soaps, shampoos and conditioners, deodorants, shaving preparations, and fragrances . In addition to its use as an ingredient in cosmetic and personal care products, it is used in numerous food items such as beer, packaged baked goods, frozen dairy products, margarine, coffee, nuts, and soda. It is also used as an inactive ingredient (e.g., solvent) in many drugs. FDA has approved its use at concentrations as high as 98% in drugs applied to the skin and 92% in drugs taken orally.