Fluorescent Brightener 220 is widely used in the textile industry to enhance the brightness and whiteness of fabrics. It is applied during the manufacturing process of synthetic fibers, such as polyester and nylon, to give them a visually appealing, radiant appearance. Additionally, it is utilized in laundry detergents and fabric softeners to make clothes appear brighter and cleaner after washing. In the paper industry, it is added to paper products to improve their whiteness and brightness, making them more attractive for printing and packaging. Furthermore, it is employed in the plastic industry to enhance the color and brightness of plastic products. Its ability to absorb ultraviolet light and emit blue light makes it effective in masking yellowing and improving the overall aesthetic quality of various materials.