molecular formula: ZnSO4·7H2O
CAS: 7446-20-0
Appearance:
Colorless crystal
Properties:
Sodium dihydrogen phosphate.Colorless trapezius crystals, particle or powder, no smell, taste acerbity.
Use:
Used in the manufacture of lithopone, and used as mordant, astringent, wood preservative, etc.
Details:
|
Test item |
Specification |
|
Reagent grade |
Pharmaceutical grade |
|
Appearance |
Conform |
Conform |
|
Assay /% |
≥99.5 |
≥99.0 |
|
Clarify degrees test |
Conform |
Conform |
|
Water insoluble/% |
≤0.01 |
≤0.02 |
|
Chloride (Cl)/% |
≤0.0005 |
≤0.002 |
|
N/% |
≤0.001 |
≤0.002 |
|
Manganese (Mn) /% |
≤0.0003 |
≤0.001 |
|
Ferric (Fe)/% |
≤0.0005 |
≤0.002 |
|
Arsenic (As)/% |
≤0.00005 |
≤0.0002 |
|
Copper (Cu)/% |
≤0.001 |
≤0.005 |
|
Cadmium Cd)/% |
≤0.0005 |
≤0.002 |
|
Lead (Pb)/% |
≤0.001 |
≤0.01 |
|
Vulcanization ammonium not sediment /% |
≤0.05 |
≤0.20 |
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