Used as a reference standard in pharmaceutical analysis for the detection and quantification of metabolites in drug development and bioavailability studies. Plays a role in metabolism research of antipsychotic drugs, particularly in understanding the metabolic pathways of paliperidone in the human body. Employed in analytical testing to validate methods for drug monitoring in clinical and forensic laboratories. Also utilized in stability studies to assess degradation products of paliperidone formulations under various storage conditions.