Widely used in bioconjugation and labeling applications, this reagent reacts selectively with primary amines to form stable fluorescent derivatives. It is commonly employed in the detection and quantification of amine-containing biomolecules such as proteins, peptides, and antibodies. Its high fluorescence intensity and water solubility make it ideal for use in fluorescence microscopy, flow cytometry, and immunoassays. Additionally, it is utilized in environmental tracing to monitor fluid flow in groundwater and industrial systems due to its strong visible fluorescence and detectability at low concentrations.