Used as a fluorescent probe in biological imaging due to its high photostability and strong emission in the red region. Its bromine substituent allows for further functionalization via cross-coupling reactions, making it useful in the development of sensors and labeled biomolecules. Commonly applied in cellular imaging, particularly for tracking membrane dynamics and intracellular structures. Also employed in photodynamic therapy research and as a building block for energy transfer systems in optoelectronic devices.