Used as a fluorescent labeling reagent in bioconjugation and imaging applications. The naphthalene amine group provides strong fluorescence, enabling detection in biological systems, while the alkyne moiety allows for click chemistry reactions, such as copper-catalyzed azide-alkyne cycloaddition (CuAAC). The tert-butyl carbamate (Boc) protecting group ensures stability during synthesis and can be removed under mild acidic conditions to release the primary amine for further functionalization. Commonly employed in the development of fluorescent probes, sensors, and labeled biomolecules for use in microscopy, flow cytometry, and biochemical assays.