Trisodium phosphate(tsp) Molecular Formula: Na3PO4.12H2O Molecular Weight: 380.12 No.of Standard: GB160779 ItemTechnical indicatorsExcellentGrade 1Grade 2Sodium phosphate (Na3PO4,12H2O),%≥ 98.598.095.0Sulfate(SO42-),%≤ 0.500.500.80Chloride(CL-),% ≤ 0.300.400.50Water insoluable,% ≤ 0.050.100.30Helianthine basicity(Na2O) 16.519.016.019.015.519.0Iron(Fe),% ≤ 0.010.010.01Arsenic(As),% ≤ 0.0050.0050.05