SR NO.
GRADE/ PARAMETER
HEPTAHYDRATE
1
Assay
98% min
2
Appearance
Green Crystalline Compound
Solubility
45-50 gm/100 ml water at 20 deg C
3
Free acid (as H2SO4)
0.25% max
Arsenic(As)
0.004% max
4
Lead (pb)
0.025%
5
Copper (cu)