Used as a reference standard in analytical laboratories for the accurate quantification of 1,2-propanediol in various samples. Commonly applied in quality control and research settings involving pharmaceuticals, cosmetics, and food products where 1,2-propanediol is used as a solvent, humectant, or excipient. Ensures calibration of instruments such as gas chromatographs (GC) and high-performance liquid chromatographs (HPLC), enabling reliable detection and measurement of 1,2-propanediol concentrations in complex matrices. Also utilized in environmental testing to assess exposure levels and in forensic analysis to identify substances in biological samples.