... ,High quality and competitive price 4,Quickly delivery Product DescriptionProduct: Sodium Tripolyphosphate (STPP)CAS No.: 7758-29-4 Molecular Formula: Na5P3O10 Molecular weight ... , Specifications: 1. Industrial grade Main content, %; 94.0 P2O5%≥ 57.0 Water insoluble %; 0.1 Iron, as Fe %; 0.015 pH of 1% water solution ... , do not pile up in the open air. Good quality Sodium Tripolyphosphate(94.0% min)