High-performance liquid chromatographic separation and determination of the process related impurities of mebendazole, fenbendazole and albendazole in bulk drugs.

Simple, specific and rapid reversed-phase high-performance liquid chromatographic methods to separate and determine potential impurities of anthelmintic drugs viz., mebendazole, fenbendazole and albendazole are reported. These methods afforded efficient separation, good resolution and identification of all the impurities examined. The methods were successfully applied not only for quality assurance, but also process development of the select anthelmintic drugs.