N-Desethyl amodiaquine is primarily used in medical research and pharmacology as a metabolite of amodiaquine, an antimalarial drug. It plays a crucial role in studying the pharmacokinetics and metabolism of amodiaquine, helping researchers understand how the drug is processed in the body. This knowledge aids in optimizing dosage regimens and minimizing potential side effects. Additionally, it is utilized in the development of new antimalarial therapies by providing insights into drug efficacy and resistance mechanisms. Its application is also significant in toxicology studies to assess the safety profile of amodiaquine and its metabolites.