Phthaloyl amlodipine is primarily utilized in the pharmaceutical industry as an intermediate in the synthesis of amlodipine, a widely prescribed medication for managing hypertension and angina. Its role is crucial in the production process, ensuring the final drug product meets the required standards for efficacy and safety. Additionally, it may be employed in research and development to explore new derivatives or formulations of amlodipine, potentially leading to improved therapeutic options for cardiovascular diseases.