Used as a fluorescent labeling reagent for the detection and quantification of carbonyl compounds, particularly in biochemical and analytical applications. It reacts selectively with aldehydes and ketones to form highly fluorescent hydrazones, enabling sensitive detection in biological samples such as cells, tissues, and bodily fluids. Commonly applied in imaging studies to monitor oxidative stress, lipid peroxidation, and metabolic disorders where carbonyl species are biomarkers. Also utilized in high-performance liquid chromatography (HPLC) with fluorescence detection for improved sensitivity and selectivity in complex mixtures. Its high quantum yield and photostability make it suitable for both in vitro and ex vivo fluorescence assays.