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) for reliable detection and measurement. Also utilized in environmental testing to assess levels of glycols in water or air samples. Its standardized concentration allows for consistent and reproducible results across multiple analyses.