O-Acetyl Losartan is primarily used as an intermediate in the synthesis of Losartan, a widely prescribed medication for managing hypertension and reducing the risk of stroke in patients with high blood pressure. Its acetylated form allows for easier handling and modification during the drug manufacturing process, ensuring the final product meets pharmaceutical standards. Additionally, it plays a role in research and development, particularly in studying the metabolism and pharmacokinetics of Losartan, aiding in the optimization of therapeutic formulations.