Technical specification Industry grade Food grade Assay ( as Na3PO4 ) %≥ 97.0098.00P2O5 Assay %≥ 42.0042.40Alkalinity ( as Na2O ) 36.0036.30PH value ( 1% solution) 11.5-12.511.5-12.5Sulfate ( as SO4) %≤ 0.500.06Chloride ( as CL ) %≤ 0.300.05Fluoride ( as F ) %≤ 0.010.001Heavy metal ( as Pb ) %≤ 0.0030.001Arsenic ( as As ) %≤ 0.0050.0003Water insoluble matter %≤ 0.100.05Trisodium phosphate anhydrous,Uses: used as water softener, detergent, meatl rust inhibitor, drier, gloss reinforcing agent, the purification agent. Packing: PLASTIC KNIT BAG, NET WEIGHT 25KG.