【 zinc sulphate heptahydrate(znso4 · 7h2o) Crystall】 Purity(zinso4 · 7h2o)≥97% Zinc(zn)≥22.5% Water insoluble≤0.05% Heavy metal(pb)≤0.001% Arsenic(as)≤0.0005% Cadmium(cd)≤0.002%
【Zinc Sulphate Hepta Granular】
SPECIFICATION
I Total Zinc content percent by weight mininum 21%
II Water soluble Zinc as percentage of total Zinc minimum 95.0%
III Sulphur (as So4-s) content as percentage minimum 10.0%
IV Magnesium (Mg) percent by mass minimum 1.0%
V Copper (cu) percent by mass minimum 0.1%
VI Arsenic 50ppm
VII Cadnium 10ppm
VIII Mercury 5ppm
IX Chromium 50ppm
X Nickel 50ppm
XI Lead 10ppm
packing: net weight 25kgs,50kgs per each plastic woven bag,or 1000kgs per each package.
