Glycerine (or glycerol) is a colorless, odorless, sweet-tasting, viscous liquid that is non-toxic and soluble in water.
It’s a type of sugar alcohol (chemical formula C3H8O3) and is widely used as a humectant (moisture-retainer) in cosmetics, a sweetener in food, and a base in pharmaceuticals.
It’s also a byproduct of soap and biodiesel production