Feed grade(HG/2934-2000)
Assay(ZnSO4.7H2O )≥98.0%
Assay(ZnSO4.H2O)≥97.3%
Zn ≥22.51%
Zn ≥22%
pH-value(50g/l solution)≥3.0
As ≥0.0005%
Chlorides ≤0.2%
Pb ≤0.0001%
Pb ≤0.002%
Cd ≤0.002%
Mn ≤0.001%
Fineness(through 250um sieve)≥95%
Fe ≤0.005%
Cu ≤0.002%
Insol. in water ≤0.02%
Use: As raw material for light-type astringent and latex products; in the making of calamine; as skin protective agent; also used in the production of rayon, petroleum and catalysts; it is also widely used in rubber, paints and pharmaceutical industries.
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