This chemical is widely used as a fluorescent labeling reagent in biochemical and biological research. It is particularly valuable for tagging proteins, peptides, and other biomolecules due to its reactive succinimidyl ester group, which forms stable covalent bonds with primary amines. Its fluorescence properties make it useful in fluorescence microscopy, flow cytometry, and other imaging techniques to visualize and track molecular interactions and localization within cells. Additionally, it is employed in the development of diagnostic assays and as a probe in studying enzyme activity and protein dynamics. Its methoxy group enhances its photostability, making it suitable for long-term imaging studies.