Molecular Formula: H3PO4 Stantard: GB 3149-2004 or Standard contract Usesa kind of acidific agents,material of food grade phosphstes,nutritive sources of yeast for beer making. Main Lndex SpecificationsLndex(First) AssayH3PO4%≥75.0-86.0 ArsenicAs%≤0.00005 FluorineF,%≤0.001 Heavy Metalsas Pb,%≤0.005 Free oxlde(as H3PO4)%≤0.012 Phosphoric Acid (food additive)