This produce is white powder. Its molecular weight is 784.1 while melting point is 220ºC. The relative desity is 1.03(at 25 ºC). It can be dissolved in solvents such as acetone, chloroform and ethanol. This product is three-function-group macromolecule obstructed phenolic antioxidant, suitable for PP, PE,PS, PVC,PA,Resin, polystyrene and cellulose plastics. It hardly can be colored without pollution. This product possesses excellent property of low lovatilization, high heating stability, and good abstraction resistance.It can obviously improve the polymer's property of heating oxidation and aging resistance. It shows perfect synergetic effect when being used togrther with DLTDP DSTDP and ultraviolet absorber. The general using rate is 0.01-0.25%.