Benzathine Phenoxymethylpenicillin and its Impurities

Benzathine Phenoxymethylpenicillin is a penicillin-class antibiotic that combines Phenoxymethylpenicillin (Penicillin V) with a benzathine salt form to provide a prolonged (long-acting) effect. Reference standards of Benzathine Phenoxymethylpenicillin API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.