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 toxicology, and alcohol in beverages. Also employed in quality control processes to validate test methods and maintain compliance with regulatory standards. Its precise concentration allows for reliable measurement and detection of ethanol in environmental, clinical, and industrial applications.