Young Chemist Allantoin is a cosmetic chemical that is widely used in skincare and beauty products. It is derived from plants, such as comfrey, and has various beneficial properties for the skin. Here is a description of allantoin, its benefits, how to use it, and some cautions to keep in mind: Allantoins is a white, odorless powder that is water-soluble. It is a natural compound that can be found in the roots and leaves of the comfrey plant. Allantoin is also synthetically produced for commercial use in cosmetics