Used primarily as a fluorescent probe in biochemical and analytical applications due to its strong emission properties in the visible range. Its rigid fused-ring structure enhances photostability, making it suitable for long-term imaging in cellular systems. Commonly employed in studying membrane dynamics and protein interactions, especially in hydrophobic environments where fluorescence intensity increases significantly. Also utilized in the development of sensors for detecting metal ions and small organic molecules in solution. Its ability to penetrate cell membranes allows for live-cell imaging without transfection agents. Additionally, it serves as a building block in synthesizing more complex fluorophores for optoelectronic materials.