-
ABOUT US
-
-
-
Product Deail
Zinc sulfate heptahydrate
【Another name】goslarite.
【Description】Colorless crystal, relative density 1.957, gradually weathering in dry air, dissolved in its own crystalline water at 39℃, dehydration into monohydrate at 100℃, heated to 280℃ completely lost crystal water, decomposition into zinc oxide at 680℃, further decomposition above 750℃, decomposition into zinc oxide and sulfur trioxide around 930℃. It reacts with alkali to form zinc hydroxide precipitate and with barium salt to form barium sulfate precipitate. Soluble in water, insoluble in ethanol, aqueous solution is weak acid.
|
Test item |
AR |
CP |
Other |
|
Assay(ZnSO4•7H2O) /% |
≥99.5 |
≥99.0 |
Custom |
|
pH(50g/L,25℃) |
4.4-6.0 |
4.4-6.0 |
|
|
Clarification test /# |
≤3 |
≤5 |
|
|
Water insoluble /% |
≤0.01 |
≤0.02 |
|
| Chloride(Cl) /% |
≤0.000 5 |
≤0.002 |
|
| Total nitrogen(N) /% |
≤0.001 |
≤0.002 |
|
| Arsenic(As) /% |
≤0.000 05 |
≤0.000 2 |
|
|
Sodium(Na) /% |
≤0.05 |
≤0.1 |
|
|
Magnesium(Mg) /% |
≤0.005 |
≤0.01 |
|
|
Potassium(K) /% |
≤0.01 |
≤0.02 |
|
|
Calcium(Ca) /% |
≤0.005 |
≤0.01 |
|
|
Manganese(Mn) /% |
≤0.000 3 |
≤0.001 |
|
|
Iron(Fe) /% |
≤0.000 5 |
≤0.002 |
|
|
Copper(Cu) /% |
≤0.001 |
≤0.005 |
|
|
Cadmium(Cd) /% |
≤0.000 5 |
≤0.002 |
|
|
Lead(Pb) /% |
≤0.001 |
≤0.01 |
【use】Used as an analytical reagent; Printing and dyeing mordant; Main raw materials for making zinc salt; Used in electroplating and electrolysis industry; Water quality stabilizer; Used as trace element fertilizer in agriculture; It is also used in electronic component production and pharmaceutical industry.
