Used primarily as a fluorescent labeling reagent in biochemical and analytical applications. It reacts with primary and secondary amines to form highly fluorescent derivatives, making it useful for the detection and quantification of amino acids, peptides, and other amine-containing compounds in HPLC and capillary electrophoresis. Its high sensitivity and stability under various conditions allow for accurate analysis in biological samples, including plasma and urine. Also employed in metabolic studies and pharmaceutical research where trace-level detection of amines is required.