Butyl Benzyl Phthalate acid Ester in Methanol Certified Reference Material is primarily used for calibration and quality control in analytical laboratories. It ensures the accuracy and reliability of instruments like gas chromatography (GC) and high-performance liquid chromatography (HPLC) when detecting and quantifying phthalate esters in various samples. This material is essential in environmental testing to monitor phthalate levels in water, soil, and air, which is critical for assessing pollution and regulatory compliance. It also plays a role in product safety testing, particularly for plastics, cosmetics, and consumer goods, to ensure they meet safety standards by detecting harmful phthalate concentrations. Additionally, it supports research studies focused on the environmental and health impacts of phthalates, providing consistent and traceable results for scientific analysis.