1.STPP 2,Manufacturer of Sodium Tripolyphosphate 3,Free sample 4,High quality and competitive price STPP, Sodium Tripolyphosphate You are worth every penny of it.STPP Sodium TripolyphosphateNa5P3O10,% ,Min.94P2O5,% ,Min.57Insolubles, % Max.0.05PH Value(1%Solution)9.5-10.0Iron (Fe), %, Max.0.015Fluoride (F), %, Max.0.003Chloride (Cl), %, Max.0.025Sulphate (as SO4), %, Max.0.4Bulk density, g/l650- ...