Cephaloridine and its Impurities

Cephaloridine or cefaloridine is a first generation semisynthetic cephalosporin. It is derived from cephalosporin C and is a zwitterion at physiological pH. It is unique among cephalosporins in that it exists as a zwitterion.Reference standards of Cephaloridine API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.