1,STPP 2, high purity 94% 3, used as main auxiliary of synthetic wash 4, good quality at competitive price. STPP Sodium ... Tripolyphosphate high purity 94% white powderPacking:25kg pp bagSpecification: Na5P3O10,% ,Min.94P2O5,% ,Min.57Insolubles, % Max.0.05PH ... , foodstuff industry, and poultry process. competitive price sodium tripolyphosphate STPP 94%