Pamsorb-1577 is 2-(4, 6-diphenyl-1, 3, 5-triazin-2-yl)-5-[(hexyl)oxy]-phenol. Acts as a light stabilizer. It is a light yellow powder. It is added at the rate of 0.1-8 phr to the powdered or granular polymer material, blended to achieve homogeneity and fed into extruders or molding machines. It is then used to make polycarbonate roofing sheets, engineering plastics and laminating films.