Used as a key intermediate in the synthesis of fluorescent whitening agents, particularly in the textile and paper industries to enhance brightness and whiteness. It is also employed in the production of optical brighteners for detergents, where it helps improve the visual appearance of fabrics by absorbing ultraviolet light and emitting blue light. Due to its reactive triazine ring, it readily undergoes nucleophilic substitution, making it suitable for coupling reactions in the development of dyes and functional materials. Additionally, it finds use in some specialty polymers and as a crosslinking agent in resin formulations to improve durability and thermal stability.