Propylene Glycol n-Butyl Ether

Propylene Glycol n-Butyl Ether (PNB) is a type of solvent with a wide variety of applications and is used in cleaning agents, inks, lubricants, liquid medications, and anti-freeze.

Surprisingly, you can find Propylene Glycol in a wide range of cosmetics, medications, and food for both people and dogs as well. The Food and Drug Administration (FDA) approves its use in these products as a means to maintain moisture levels.