Product Name: sodium tripolyphosphate (STPP)Chemical formula: Na5P3O10Molecular weight: 367.86Standard executed: GB9983-2004Technical Specifications:SpecificationsSuperior qualityFirst-gradeQualified productsSodium Tripolyphosphate(Na5P3O10)% ≥969490Phosphorus Pentoxide(P2O5)% ≥57.05756.5Water insoluble matter %≤0.100.100.10Fe%≤0.0070.0150.015PH9.2--10.0Whiteness %≥909080Apparent density0.35-0.9