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 specimens, and alcoholic beverages. Commonly employed in quality control and regulatory testing to verify the concentration of ethanol in consumer products and biological fluids. Also utilized in method validation and system suitability testing to maintain analytical precision and compliance with regulatory standards.