We offer STPP of both Technical and Food Grade, white powder or crystal, Molecular formula:Na5p3O10; Na5p3O10:94%min; P2O5:57%min; Water insoluble: 0.1%max; 0.05%max(Food Grade) Fe: 0.01%max; PH value: 9.2-10.0 and so on. The technical one is mainly applied in china, scour, petroleum, metallurgy, mining, water treatment, printing, and dyeing industry and so. The Food one may be used to food such as meat, canned meat, as quality improvement agent. If you are interested in the product, please feel free to contact us. Your inquiry will be much appreciated.