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 an ingredient. Ensures measurement accuracy in techniques such as gas chromatography (GC) and high-performance liquid chromatography (HPLC). Also used in environmental testing to calibrate instruments for detecting trace levels of glycols in water and air samples.