Zinc Sulphate Heptahydrate 21% (Agri grade)
Zinc sulfate, chemical compound ZnSO4, a very water soluble, transparent,
colorless, crystalline compound. It is commonly used as the heptahydrate,
ZnSO47H2O, and is commonly called white vitriol; and can be prepared by
reacting zinc with sulfuric acid. It is used to supply zinc in animal
feeds, fertilizers, and agricultural sprays; in making lithopone; in
coagulation baths for rayon; in electrolyte for zinc plating; as a mordant
in dyeing; as a preservative for skins and leather; and in medicine as an
astringent and emitic.
Specifications:
| 1 | Appearance | White crystal |
| 2 | ZnSO47H2O | 99% Max |
| 3 | Zn Content | 21% Min |
| 4 | Cu Content | 0.1% |
| 5 | Pb Content | 0.003% |
| 6 | Cd Content | 0.0025% |
| 7 | Water insolubles | 0.05% Max |
| 8 | Sulphur as S | 10.0% |
| 9 | PH not less than | 4.0 |