Propylene glycol is a clear, colorless, syrupy liquid, which is odorless and tasteless. It is a synthetic liquid, absorbs moisture and is completely soluble in water. Propylene glycol comes from petrochemical sources.
Propylene glycol is used in the food, cosmetic, pharmaceutical and chemical industries. It has many uses and is a very versatile substance. This wide use means that much is known about the safety of this material. Propylene glycol, for example, is used in anti-freeze.
It is recognized as safe for use