Used as a fluorescent labeling reagent in biochemical and analytical applications. Its high sensitivity to environmental polarity makes it suitable for probing protein interactions, membrane dynamics, and conformational changes in biomolecules. Commonly employed in immunoassays and receptor binding studies due to its strong fluorescence signal upon binding to target molecules. Also applied in the development of fluorescent sensors for detecting metal ions and small biomolecules in solution. Stable under a wide range of pH and solvent conditions, allowing use in diverse experimental setups.