Other name: Nickelous sulfate
Molecular formula: NiSO4·6H2O
Molecular weight: 262.84
Property: At 533 ℃ into a β-green transparent crystals. 40 ℃, stable at room temperature into a blue opaque crystals. Containing seven crystal clear emerald water of crystallization. A sweet astringent taste. Slight weathering. The relative density of 2.031,1.98 (7 monohydrate). Loss of about 5 at 100 ℃ crystal water molecules into a water thing, at 280 ℃, a yellow-green anhydrous (relative density 3.68). Soluble in 1.4 parts water, slightly soluble in ethanol, methanol, the acidic aqueous solution, PH about 4.5. Melting point of 31.5 ℃.
Mainly used in electroplating, electroless nickel and electroless nickel is the main nickel salt is nickel-metal ion source, in the process of electroplating, electroless nickel ions and sulfate ions. Hardening in oil production is oil hydrogenation catalyst. Pharmaceutical industry for the production of vitamin C in the oxidation catalyst. Nickel industry for the production of other inorganic salts such as ammonium nickel sulfate, nickel oxide, nickel carbonate, etc. The main raw materials. Printing and dyeing industry for the production of phthalocyanine blue complexing agent for vat dyes mordant, for the production of nickel-cadmium batteries.
Testing item |
Industrial first grade |
Second grade |
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Excellent |
Industrial |
Qualified |
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Content (Ni) ≥ % |
22.0 |
21.5 |
21.0 |
20.5 |
Cobalt (Co) ≤ % |
0.0001 |
0.2 |
0.5 |
0.5 |
Iron (Fe) ≤ % |
0.0005 |
0.002 |
0.005 |
0.005 |
Copper (Cu) ≤ % |
0.0005 |
0.002 |
0.002 |
0.003 |
Lead (Pb) ≤ % |
0.0005 |
0.001 |
0.002 |
0.002 |
Zinc (Zn) ≤ % |
0.0005 |
0.003 |
0.004 |
0.008 |
Sodium (Na) ≤ % |
0.01 |
----- |
------ |
------ |
Calcium (Ca) ≤ % |
0.001 |
----- |
----- |
------ |
Magnesium (Mg) ≤ % |
0.001 |
----- |
----- |
------ |
Cadmium (Cd) ≤ % |
0.0005 |
----- |
----- |
------ |
Chromium (Cr) ≤ % |
0.0005 |
----- |
----- |
------ |
nitrate ≤ % |
0.001 |
0.01 |
0.01 |
0.02 |
Water insoluble≤ % |
0.05 |
0.03 |
0.04 |
0.05 |