25-Hydroxyvitamin D3 Description The major circulating metabolite of vitamin D3 (Cholecalciferol). It is produced in the liver and is the best indicator of the body's vitamin D stores. It is effective in the treatment of rickets and osteomalacia, both in azotemic and non-azotemic patients. Calcifediol also has mineralizing properties. Specifications Cas No. 19356-17-3 Product ID H9815 Product Name 25-Hydroxyvitamin D3 Formula Wt. 400.64