1,Manufacturer of Sodium Tripolyphosphate (STPP) 2,Free sample 3,High quality and competitive price 4,Quickly delivery Product DescriptionProduct: Sodium Tripolyphosphate ( ... STPP)CAS No.: 7758-29-4 Molecular Formula: Na5P3O10 Molecular weight: 367.86 1, Properties: White ... %; 0.05 Iron, as Fe %; 0.01 pH of 1% water solution 9.5-10.0 Heavy metal, as ...