Factory price pharmaceutical grade refined 1,2,3-propanetriol glycerin glycerol and Glycerine USP 99.5% and 99.7% Glycerol is an organic compound, also called glycerin or glycerine. It is a colorless, odorless, viscous liquid that is sweet-tasting and non-toxic. It is is widely used in FDA approved wound and burn treatments. It can also be used as an effective marker to measure liver disease. It is also widely used as a sweetener in the food industry and as a humectant in pharmaceutical formulations. Glycerol has three hydrophilic hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature. The glycerol substructure is a central component of many lipids.