Used as a fluorescent probe in biochemical and analytical applications due to its strong emission properties. It serves as a key component in sensors for detecting metal ions, especially in environmental and biological samples. Its carboxylic acid groups allow easy conjugation to biomolecules, making it useful in labeling peptides, proteins, and nucleic acids for imaging and detection. Also employed in the development of optoelectronic devices and dye-sensitized solar cells because of its stable photoluminescence and electron-accepting characteristics.