Propylene glycol and its Impurities

Propylene glycol is used to absorb extra water and maintain moisture in certain medicines, cosmetics, or food products. It is a solvent for food colors and flavors, and in the paint and plastics industries. Propylene glycol is also used to create artificial smoke or fog used in fire- fighting training and in theatrical productions. Reference standards of Propylene Glycol API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.