Coumarin 498 is widely used as a fluorescent dye in various industrial and scientific applications. It is particularly valued for its bright green fluorescence under ultraviolet light, making it a popular choice in the production of highlighter inks, dyes, and markers. Additionally, it is employed in the manufacturing of optical brighteners for textiles and paper to enhance their visual appearance. In research, Coumarin 498 serves as a fluorescent tracer in biological and chemical studies, aiding in the visualization of processes and structures. Its stability and intense fluorescence also make it suitable for use in laser dyes and other photonic applications.