... certificate 3.export to USA, Trisodium phosphate:Na3PO4.12H2O ,TG , Assay :98.0 %min , P2O5: 18.3 %minTrisodium phosphate (TSP) Chemical formula: Na 3PO4 ... insoluble, % max0.1Heavy metals, as Pb. % max-----Arsenic,as As. % max-----Fluoride,as F. % max-----Sulfate,as SO4 % max0.5Chloride,as Cl. % max1.5 USE:Used ...