增白劑，高分子量螢光增白劑，適用於工程塑料，PBT, PET, PC, PA, PMMA, TPU, PVC, PS, ABS, PP, PE等。
A high molecular weight optical brightener (fluorescent whitening agent) of the thiophenediyl benzoxazole class, suitable for the optical brightening of polymers at all stages of processing. highly effective in polymer substrates such as engineering plastics, e. g. polyesters, polycarbonate, polyamides and acrylics, thermoplastic polyurethane, polyvinylchloride, styrene homo- and copolymers, polyolefins, adhesives, and other organic substrates.