Used primarily as a reference standard in pharmaceutical quality control to detect and quantify impurities during the manufacturing and stability testing of losartan potassium, a widely prescribed angiotensin II receptor blocker. Helps ensure drug purity, safety, and consistency by enabling accurate identification of degradation products or synthesis by-products in analytical procedures such as HPLC and LC-MS. Also utilized in research settings to study metabolic pathways and impurity profiling of sartan-class antihypertensive drugs.