CAS 1627731-61-6(free base) appears in our catalog under these names: Zoledronic Acid EP Impurity B Dihydrate, Zoledronic Acid Impurity 2（Zoledronic Acid EP Impurity B）. Offered by: Chemat Brand, Hubei YoungXin. Available pack sizes: on request, 10mg, 25mg, 50mg, 100mg, 200mg.