This product is an aryl alkyl phosphite antioxidant, suitable for a variety of polymers, including polycarbonate, coating, polyolefin, ABS and PET fiber. It can provide good color improvement and thermal stability during processing and later stage. As an efficient auxiliary stabilizer and chelating agent, it can be used in hard or soft PVC materials to improve the brighter and more uniform color and transparency of PVC materials and improve the thermal stability of PVC.