Used as a calibration standard in gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) analyses to ensure accurate identification and quantification of volatile organic compounds. Commonly employed in environmental testing, occupational health monitoring, and industrial hygiene to validate instrument performance and analytical methods. Helps maintain compliance with regulatory standards by providing a reliable reference for measuring n-hexane and related hydrocarbons in air, water, and soil samples. Also used in quality control laboratories for solvent analysis and in the preparation of working standards through dilution.