Used as a high-performance fluorescent whitening agent in optical brighteners for plastics, coatings, and synthetic fibers due to its strong UV absorption and blue light emission. Exhibits excellent thermal and photostability, making it suitable for polymer processing at high temperatures. Commonly applied in polyethylene, polypropylene, and polyester to enhance brightness and visual clarity. Also utilized in specialty formulations for laser dyes and fluorescent sensors because of its rigid conjugated structure and high quantum yield.