Profile: Tongvo Industrial Limited offers copper pyrophosphate, potassium pyrophosphate, phosphoric acid, and phosphorus derivatives. Our products are used for surface treatment, electro-coating, water treatment, food, beverages and pharmaceuticals, hygiene, industrial & household cleaning, flame retardants and crop protection. Our surface treatment chemicals include potassium pyrophosphate, copper pyrophosphate and stannous sulphate. Our food application products include food grade phosphoric acid, potassium pyrophosphate, stannous pyrophosphate, stannous sulphate and stannous chloride.