Used in research to study vasopressin receptor activity, particularly in understanding the role of vasopressin in physiological processes like water retention, blood pressure regulation, and social behaviors. It serves as a selective agonist for V1a receptors, aiding in the exploration of receptor signaling pathways and potential therapeutic targets for conditions such as hypertension, heart failure, and neuropsychiatric disorders. Its application extends to in vitro and in vivo studies to evaluate the effects of vasopressin modulation in various biological systems.