Used primarily as a fluorescent whitening agent in various industries. It is applied in the production of detergents and laundry products to enhance the brightness of fabrics, making them appear whiter and cleaner. Additionally, it is utilized in the paper industry to improve the visual appeal of paper products by increasing their whiteness. In the textile industry, it serves as a dye auxiliary to enhance the vibrancy and brightness of colored fabrics. Its fluorescence properties also make it valuable in certain analytical and research applications, where it is used as a marker or tracer in biological and chemical studies.