Chemical name : 3, 5 - di - butyl - 4 ¨c hydroxybenzoic acid , Hexadecyl ester Molecular formula : c31h54o3 Molecular weight : 475 Cas no : 067845 - 93 - 6 Specification : Appearance : white to off white powder Melting point : 58.0 min Toluene insolubles , % : 0.2 max Loss on drying , % : 0.5 % Color ( 10 % solution ) : 450 max Color scale : 60 max Purity : ¡ý 99.0 % Application : Uv ¨c 2908 mainly used in polyolefin plastic like pp and pe . It has excellent compatibility with uv absorbers , hals and Thioedters . Fda sanctioned to 0.5 % in polyolefins . Package : 20kg / cardboard drum with pe bag inside . 20kg/carton, 400kg/pallet