Used as a reference standard in analytical chemistry for the detection and quantification of carbonyl compounds, particularly aldehydes and ketones, in environmental and biological samples. Commonly applied in high-performance liquid chromatography (HPLC) and gas chromatography (GC) methods to identify trace levels of aldehydes in air, water, and food products. Its derivatization capability enhances detection sensitivity by converting volatile carbonyls into stable, detectable hydrazone derivatives. Widely utilized in air quality monitoring to measure aldehyde pollutants such as acrolein and formaldehyde when present alongside propionaldehyde. Also employed in metabolic studies and industrial hygiene testing to assess exposure to hazardous carbonyl compounds.