Quetiapine N-Oxide is primarily used in research and development as a metabolite of quetiapine, an antipsychotic medication. It plays a significant role in pharmacokinetic studies to understand the drug's metabolism and excretion pathways. Researchers utilize it to investigate the biotransformation processes and to identify potential interactions with other drugs. Additionally, it aids in the development of analytical methods for detecting and quantifying quetiapine and its metabolites in biological samples, ensuring accurate monitoring of drug levels in patients. This compound is also valuable in toxicology studies to assess the safety and potential side effects of quetiapine therapy.