Product Details :
Product Name | : ZINC SULPHATE HEPTAHYDRATE |
C.A.S. No. | : 7446-20-0 |
Molecular Formula | : ZnSO4.7H2O |
Molecular Weight | : 287.5 |
SPECIFICATION | IP | BP | USP |
Description | Colorless , transparent crystals or white powder crystalline powder ,odorless ,efflorescent. | White or almost white , crystalline powder or colorless, transparent crystals, efflorescent. | White or almost white, crystalline powder or colorless, transparent crystals, efflorescent. |
Solubility | - | Very soluble in water and practically insoluble in ethanol (96 % ) | - |
Appearance of solution | Clear and colorless | 5 % solution is clear and colorless. | Clear and colorless |
Identification (A) By Color (B) Reaction (C) Reaction
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B: It gives reaction of Zinc.
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A: It gives reaction of Sulphates. B: It gives reaction of Zinc. C: It complies with the limit test of the Assay. |
A : It gives reaction of Sulphates. B : It gives reaction of Zinc.
|
pH (5 % solution ) | 4.4 - 5.6 | 4.4 - 5.6 | - |
Acidity | - | - | Solution is not colored pink by methyl orange TS |
Chloride | Not more than 250 ppm | Not more than 300 ppm | - |
Iron | Not more than 100 ppm. | Not more than 100 ppm | - |
Arsenic | Not more than 10 ppm. | - | NMT 14 ppm |
Lead | - | - | NMT 20 ppm |
Alkalies & alkaline earths | - | - | NMT 0.9 % |
Residual solvents | - | - | Meets the requirement |
Assay | 99 .0 % to 104.0 % | 99.0 % - 104.0 % | 99.0 % - 108.7 % |
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