FK1052 hydrochloride is primarily utilized in research settings to study its effects on serotonin receptors, particularly the 5-HT4 subtype. It serves as a valuable tool in neuroscience and pharmacology for understanding serotonin-mediated signaling pathways and their implications in gastrointestinal motility, mood regulation, and cognitive functions. Researchers also explore its potential therapeutic applications in treating conditions like irritable bowel syndrome (IBS) and depression, given its receptor-specific activity. Additionally, it aids in the development of novel drugs targeting serotonin-related disorders.