phenformin hydrochloride and its Impurities

A hydrochloride salt of Phenformin, which is an antidiabetic drug. It belongs to biguanide class and is used in the treatment of Diabetes. Currently withdrawn from the market dur to toxicity caused by Lactic acidosis.Reference standards of Phenformin Hydrochloride API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.