Used as a fluorescent probe in biological imaging due to its strong emission in the visible range. It readily binds to cellular membranes and allows visualization of membrane dynamics in live cells. Also employed in dye-sensitized solar cells as a spectral sensitizer to enhance light absorption in the visible region. Its sulfonate group improves water solubility, making it suitable for aqueous-based applications. Additionally, it serves as a precursor in the synthesis of cyanine dyes for use in optical sensors and labeling biomolecules.