Used as a selective antagonist for the angiotensin II receptor subtype 1 (AT1), primarily in research settings to study cardiovascular functions and hypertension mechanisms. It helps in investigating the role of the renin-angiotensin system in vascular and renal physiology. Commonly applied in experimental models to block angiotensin II-induced vasoconstriction, enabling analysis of blood pressure regulation and potential therapeutic targets for heart-related diseases.