Chemical name: Pentaerythritol tetrakis(2-cyano-3,3-diphenylacrylate) CAS No.: 178671-58-4 Molecular formula: C69H48N4O8 Molecular weight: 1061.14 Appearance: White crystalline powder Assay, %: 98.5 min. Melting point :175-178 degree Loss on Drying, %: 0.5 max. Transmittance: 460nm 95% min. 500nm 98% min. UV ABSORBER HOSORB UV 3030 can strongly absorb UV wavelength in range 280-320nm and exhibits excellent heat stability and minimum volatility due to its high molecular weight. It can be used to stabilize polymers with high extrusion temperatures.� It is suitable for PA and PET. Especially suitable for stabilizing polycarbonates due to the good compatibility with the production process and excellent stabilizing effect.