Used primarily in research settings as a selective antagonist for dopamine receptors, particularly D4 receptor subtype studies. It serves as a key compound in neuropharmacology for investigating dopaminergic pathways linked to psychiatric disorders such as schizophrenia, ADHD, and substance abuse. Its high selectivity allows scientists to isolate D4 receptor activity, aiding in the development of targeted therapies. Also utilized in radiolabeled form for receptor binding assays and imaging studies to map receptor distribution in brain tissue. Not intended for clinical use in humans; strictly for laboratory and experimental applications.