Fluorescent Brightener 28 is a specialty chemical widely used as an optical brightening agent in various industries. In the textile industry, it enhances the brightness and whiteness of fabrics, particularly during the manufacturing of synthetic fibers like polyester, nylon, and cotton blends, by absorbing ultraviolet light and re-emitting it as visible blue light. It is also utilized in the paper industry to improve the visual appeal of products such as high-quality printing paper and packaging materials. Additionally, it is a key ingredient in detergents and laundry products to maintain the brightness of white clothes and prevent yellowing. Its applications extend to plastics for whitening and enhancing appearance, and in cosmetics, such as shampoos and conditioners, to give hair a shinier, healthier look.