In food industry,it is used as bulking agent,buffer,chelate agent,yeast food,flavoring, nutrition enhancer, accessory ingredie Name of indexFCC-1997Content(on the base of dry basis),%≥98.0Arsenic (As),%≤0.0003Heavy metal(As Pb),%≤0.0015Fluorides(As F),%≤0001Pb,%≤0.0005Water insolubles,%≤0.2Loss on drying,%≤1.0 Dipotassium phosphate