Testing Items				monohydrate	heptahydrate
Appearance				White powder	--
Zinc Sulphate content    %			≥	96.09	99
Zn                       %			≥	35	22.51
Pb                       %			≤	0.001	0.001
As                       %			≤	0.0005	--
Cd                       %			≤	0.001	0.001
Fineness 60~80 mesh      %			≥	95	--
Water insoluble matter   %			≤	--	0.02
PH                       %			≥	--	3
Fe                       %			≤	--	0.003
Mn                       %			≤	--	0.005
Packaging: 25kg Weaving.