YIPHOSR4025 is a nonylphenol-free phosphite antioxidant,can be usedin polyolefins,rubber and PVC. YIPHOSR4025 is a multifunctionalantioxidant for organic polymers. It exhibits good antioxidant effectswhen used at typical level of 0.1 to 3.0 wt%,improving the color，lightstability and clarity of polymers，especially combined with primarymetal stalibilizers and epoxy stabilizers. When used in rubber，4025shows more excellent color improvement than TNPP.