Used primarily in the synthesis of cyanine dyes, which are essential in various imaging and sensing applications. These dyes are widely employed in biological research for fluorescence labeling, enabling the visualization of cellular structures and processes. Additionally, it serves as a key intermediate in the production of photosensitizers for photodynamic therapy, a treatment method targeting cancer cells. Its role in creating advanced materials for optical data storage and laser technology is also notable, contributing to the development of high-performance devices.