azathioprine sodium and its Impurities

Azathioprine is converted into 6-mercaptopurine in the body where it blocks purine metabolism and DNA synthesis.Azathioprine is used alone or in combination with other immunosuppressive therapy to prevent rejection following organ transplantation. Reference standards of Azathioprine Sodium API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.