ST-193 hydrochloride is primarily utilized in biomedical research, particularly in the study of serotonin receptors. It acts as a selective agonist for the 5-HT6 receptor subtype, which is implicated in various neurological processes. This compound is often employed in preclinical studies to investigate the role of 5-HT6 receptors in cognitive functions, memory, and behavior. Researchers use it to explore potential therapeutic applications for neurodegenerative disorders such as Alzheimer's disease, as well as psychiatric conditions like depression and anxiety. Its specificity for the 5-HT6 receptor makes it a valuable tool for understanding receptor signaling pathways and developing targeted treatments. Additionally, ST-193 hydrochloride is used in pharmacological assays to screen and evaluate the efficacy of new drugs aimed at modulating serotonin receptor activity.