This chemical is primarily used as a fluorescent whitening agent in various industries. It is commonly applied in the production of detergents and laundry products to enhance the brightness and whiteness of fabrics. The compound works by absorbing ultraviolet light and re-emitting it as blue light, which counteracts the yellowing effect on textiles, making them appear whiter and brighter. Additionally, it is utilized in the paper industry to improve the visual appeal of paper products, giving them a cleaner and more vibrant appearance. Its sulfonic acid groups provide water solubility, making it effective in aqueous formulations.