Nitazoxanide CAS 55981-09-4 Broad Spectrum Antiprotozoal Agent API for Veterinary Research Overview Nitazoxanide CAS 55981-09-4 belongs to thiazolide derivatives. This active pharmaceutical ingredient delivers broad activity against protozoa, helminths and multiple microorganisms. It blocks anaerobic energy metabolism via inhibiting PFOR enzyme, supporting formulation development and laboratory study targeting parasitic infections. The solid powder maintains stable physicoche