O-phenylphenol (OPP) is a kind of organic chemical product with a wide range of uses, which is widely used in the fields of sterilization and corrosion prevention, printing and dyeing auxiliaries and surfactants, and the stabilizer and flame retardant of synthetic new plastics, resins and polymer materials.OPP and its sodium salt have a broad spectrum of sterilization and mildew removal ability, and low toxicity and tasteless, is a better preservative, can be used for the mildew preservation of fruits and vegetables, especially suitable for the mildew prevention of citrus, can also be used to treat lemon, pineapple, pear, peach, tomato, cucumber, can make the decay to a minimum.