Used as a reference standard in analytical laboratories for the calibration of instruments such as gas chromatographs (GC) and high-performance liquid chromatographs (HPLC). Ensures accurate quantification of ethanol in various samples including pharmaceuticals, forensic blood alcohol analysis, and quality control in food and beverage industries. Also employed in environmental testing to detect ethanol in water or air samples. Its precise concentration allows for reliable method validation, system suitability testing, and compliance with regulatory standards.