Chemical name: Light Stabilizer Blend 50% HALS944 + 50% HALS770 CAS No.:70624-18-9  52829-07-9                                                                 Apprearance: White or slightly yelloeish solid Melting Range, ℃: 〉50 Relative Density : 1.0-1.2g/l Vapor Tension,  20℃: <0.01Pa                                                                 LIGHT STABILIZER LS-791 is a synergistic mixture of Light stabilizer 944 and Light stabilizer 770. It is an excellent UV stabilizer particularly suitable for thick products of PP, PP/EPDM and PP/PE/EPDM co-polymers and PP and HDPE tape, providing great surface protection. The synergism between the high and low molecular weight HALS components of Light stabilizer 791guarantees maximum protection for the polymer against degradation from UV radiation and long-term heat exposure.  info at hhochem. com