Chemical name: Pentaerythritol tetrakis(2-cyano-3,3-diphenylacrylate) CAS No.: 178671-58-4 Molecular formula: C69H48N4O8 Molecular weight: 1061.14 Molecular structure Specification Appearance: White crystalline powder Assay, %: ?98.5 Melting point :175-178 degree Loss on Drying, %: ?0.5 Transmittance: 460nm?95% 500nm?98% Application 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. info at hhochem. com