(1)Whiteness:> 80
(2)Assay:> 99%
(3)Loss on Drying:=< 0.5%
(4)Acidity and Alkalinity:=< 1%
(5)Heavy Metals (as Pb) :=< 1mg/ kg
(6)Arsenic :=< 0.5mg/ kg
(7)Ammonium (as NH﹢4):=< 100mg/ kg
(8)Sodium Chloride :=< 1.45%
(9)Water Insoluble Impurities:=< 0.05%
(10)Water Insoluble Residue: =