Displaying 3 results of Fenbendazole Stable Isotopes Fenbendazole Stable Isotopes are isotopically labeled derivatives of fenbendazole, a broad-spectrum anthelmintic drug used to treat parasitic infections in animals. These stable isotopes are used in pharmacokinetic studies to determine the metabolic fate and distribution of fenbendazole in living organisms. They are also used in environmental monitoring and forensic investigations to trace the source and transport of fenbendazole in soil and water samples.