every kind of Chitosans in powder, flake and crab shell appearance, DAC from 85-98,more than 20 years ... production, we supply every kind of Chitosan in powder, flake and crab shell appearance, DAC from 85-98, for use of pharmaceuticals ... , food, cosmetic, herb extraction, tobacco, water treatment, Water/air Purification and many varies of field. Top quality from China. Chitosan SeriesCommon ...