It is an excellent liquid hindered phenols antioxidant. It has fine anti-oxidized, and good synergistic effect when being used with auxiliary antioxidant, specially used for polyurethane, could be added before, in the middle of, after polymerization. It has good usability and anti-pyrogenic effect. To improve the high temperature stability when be used in lubricating oil. It can effectively prevent degradation with aging in the production and processing polyester fibre.