Used as a fluorescent probe in biological imaging due to its strong emission and photostability. Its lipophilic nature allows it to penetrate cell membranes, making it suitable for intracellular staining and tracking. Also employed in the development of sensors for detecting metal ions and pH changes in solution. The compound's rigid xanthene backbone enhances fluorescence quantum yield, beneficial in optoelectronic applications and laser dyes. Additionally, it serves as a building block in synthesizing advanced functional dyes and photoactive materials.