Purity (as H2C2O4? 2H2O)	99. 6 % min
Sulphate (as SO4 )	100 ppm
Chloride (as Cl )	5 ppm
Iron (as Fe)	5 ppm
Heavy Metals( as Pb)	2 ppm
Ash	100 ppm
Ca	2 ppm
As	0. 5 ppm