NAN-190 hydrobromide is primarily used in research settings to study serotonin receptors, particularly the 5-HT1A subtype. It acts as a selective antagonist, helping scientists understand the role of these receptors in various physiological and behavioral processes. This compound is valuable in investigating the mechanisms of anxiety, depression, and other mood disorders, as well as in exploring potential therapeutic targets for these conditions. Additionally, it aids in studying the effects of serotonin modulation on cognitive functions and neurochemical pathways in the brain. Its application is limited to experimental and preclinical studies, contributing to advancements in neuroscience and pharmacology.