Cyasorb UV-5411 2-(2-Hydroxy-5-t-octylphenyl)-benzotriazole 003147-75-9 Cytec Light stabilizer / UV-absorber >> Benzotriazole CYASORB UV-5411 light stabilizer is sanctioned by the FDA as a stabilizer for polycarbonate resins (21C 178.2010) complying with Section 177.1580, provided the levels of usage do not exceed 0.5% by weight of polymer and that the finished resins contact food only under conditions of use E, F, and G described under Table 2 of Section 176.170. Strong UV absorbers which improve weatherability and service life of coatings.