Hydroxychloroquine Impurity F is primarily used in the pharmaceutical industry for quality control and regulatory compliance. It serves as a reference standard in the analysis and identification of impurities in hydroxychloroquine formulations. By ensuring the purity and safety of the active pharmaceutical ingredient, it plays a critical role in the development and manufacturing process. Additionally, it aids in research and development efforts to study the stability and degradation pathways of hydroxychloroquine, contributing to the improvement of drug efficacy and safety profiles. Its application is essential for meeting stringent regulatory standards in the production of hydroxychloroquine-based medications.