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ZINC SULPHATE
HEPTAHYDRATE |
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MOLECULAR FORMULA: ZnSO4.7H20 MOL WT: 287.56 CAS NO. 7446-20-0 |
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DESCRIPTION: COLOURLESS,
TRANSPARENT CRYSTALS OR A WHITE CRYSTALLINE POWDER; ODOURLESS; EFFLORESCENT. |
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GRADES |
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SPECIFICATION |
IP |
BP |
USP |
ACS |
AR |
LR |
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IDENTIFICATION |
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TO COMPLY |
TO COMPLY |
TO COMPLY |
--- |
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TO COMPLY |
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SOLUBILITY |
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--- |
TO COMPLY |
--- |
--- |
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APPEARANCE OF SOLUTION |
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TO COMPLY |
TO COMPLY |
--- |
--- |
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pH OF 5% SOLUTION |
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4.4-5.6 |
4.4-5.6 |
--- |
4.4-6.0 |
5.2-6.0 |
4.4-5.6 |
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IRON |
MAX. |
100PPM |
100PPM |
--- |
0.001% |
0.0005% |
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CHLORIDES |
MAX. |
250PPM |
300PPM |
--- |
5PPM |
0.001% |
250PPM |
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ASSAY |
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99.0-104.0% |
99.0-108.7% |
99.0-103.0% |
99.5-100.5% |
99.0-104% |
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ACIDITY |
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--- |
--- |
TO
COMPLY |
--- |
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10PPM |
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ARSENIC |
MAX. |
10PPM |
--- |
14PPM |
1PPM |
0.0001% |
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LEAD |
MAX. |
--- |
--- |
0.002% |
0.003% |
0.001% |
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ALKALIES& ALKALINE EARTHS |
MAX. |
--- |
--- |
0.9% |
--- |
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MANGANESE |
MAX. |
--- |
--- |
--- |
3PPM |
0.0003% |
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INSOLUBLE MATTER |
MAX. |
--- |
--- |
--- |
0.01% |
0.01% |
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NITRATE |
MAX. |
--- |
--- |
--- |
0.002% |
0.001% |
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AMMONIUM |
MAX. |
--- |
--- |
--- |
0.001% |
0.001% |
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MAGNESIUM |
MAX. |
--- |
--- |
--- |
0.005% |
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POTTASIUM |
MAX. |
--- |
--- |
--- |
0.01% |
0.005% |
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SODIUM |
MAX. |
--- |
--- |
--- |
0.05% |
0.005% |
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CADMIUM |
MAX. |
--- |
--- |
--- |
--- |
0.001% |
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CALCIUM |
MAX. |
--- |
--- |
--- |
0.005% |
0.005% |
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