Dansylhydrazine is widely used as a fluorescent labeling reagent in biochemical and analytical applications. It is particularly effective for detecting carbonyl compounds, such as aldehydes and ketones, in various samples. The compound reacts with these carbonyl groups to form stable hydrazone derivatives, which can be easily detected due to their strong fluorescence. This property makes it a valuable tool in high-performance liquid chromatography (HPLC) and thin-layer chromatography (TLC) for the analysis of complex mixtures. Additionally, dansylhydrazine is employed in the study of lipid peroxidation, where it helps identify and quantify lipid-derived aldehydes, providing insights into oxidative stress and related biological processes. Its sensitivity and specificity also make it useful in proteomics for the detection and characterization of glycated proteins, which are important markers in diabetes research. Overall, dansylhydrazine serves as a versatile and reliable reagent in both research and diagnostic applications.