Specification :

Zinc Sulphate Heptahydrate ( Technical-grade)
Molecular formula: ZnSO4 7H2O
Molecular weight: 287.56
Physical and chemical property: White crystal, relative density is 3.31, deliquescent in air, easy to dissolve in water, slightly dissolve in sterols, insoluble in acetone, loose crystal water at 280 and to be anhydride, decompose as zinc oxide( ZnO) and sulfur trioxide( SO3) at 740 .

INDEX
Products grade Excellent grade Grade I
Major componets Zn % e 35.5 35
ZnSO4 7H2O % e 99 98
Insoluble substance % d 0.020 0.050
Lead( Pb) % d 0.001 0.002
Cadmium( Cd) % d 0.001 0.002
Fe % d 0.003 0.005
Mn % d 0.005 0.010

Package: net weight 25Kg in bags.
Usage: Technical-grade Zinc Sulphate Monohydrate is widely used as intermediates of pharmaceutical, pesticide, dope, dye and pastel, chemical additives, chemical raw material and so on.