STPP 94%Min; P2O5:57%Min; Phase I: 15-40% Heavy ... 10 years producing experie STPP Sodium TripolyphosphateNa5P3O10,% ,Min.94P2O5,% ,Min.57Insolubles, % Max.0.05PH Value(1%Solution ... Max.0.4Bulk density, g/l650-990White degree %,Min.93Phase I10-30Used as main auxiliary of synthetic wash ... suspension such as paint, kaolin, magnesium oxide, calcium carbonate drilling mud, preservative agent for paper making, ...