what is butylene glycol
Butylene Glycol: Definition and Uses. Butylene Glycol is a chemical compound also known as 1,3-Butanediol. Like glycerin, Butylene Glycol (BG) is a humectant, a chemical that helps your skin (or other substances) retain moisture. It is also a solubilizer, which means it makes other substances (such as fat) more soluble in water. Like glycerin, it is a common ingredient in cosmetics. It is also a common ingredient in food.