SodiumTripolyphosphateSTPP CASNo.:7758-29-4 Foodgradestandard:QB1034-91 Industrygradestandard:GB9983-2004 Formula:Na5P3O10 Usage:SodiumTripolyphosphateisusedasoneofthemainauxiliariesforsyntheticdetergent,synergistforsoap;Watersoftener,tanningagentforleathermaking,auxiliaryfordyeing;Asaneffectivedispersionagentforsuspensionsolutionsofcoatings,kaolin,magnesiumoxide,calciumcarbonateanddrillingmudetc.Asanoilcontaminationresistanceagentinpaperproduction. No. Specifications IndustrialGrade 1 Na5P3O10% 94.0 2 P2O5% 57.0 3 Iron(Fe)% 0.003 4 Waterinsolubles% 0.05 5 PH 9.5-10 6 So4% 0.4 7 PB % 0.01