Nickel Sulphate

Nickel Sulphate

Nickel Sulphate Manufacturer & Supplier in India

Nickel Sulfate is a crystalline inorganic compound that is yellow, green or blue coloured and produces toxic gasses upon heating. It is used in electroplating and as a chemical intermediate to produce other types of nickel compounds. Nickel Sulfate is a by-product of copper refining and it naturally occurs as a rare mineral which is retgersite. Retgersite is a type of chemical that is useful in utensils, jewellery, coins, metal buttons, and eyeglasses. Nickel Sulfate is also used for making paper clips, keys, enamel dyes, and electrical wiring. Nickel Sulfate hexahydrate is also known as blue salt. And it may be produced by the dissolution of nickel metal or nickel oxides in the sulfuric acid.

Appearance:

Powder - White Crystalline Powder

Physical Properties of NiSO₄

•    It occurs in yellow solid when in anhydrous form, green-blue crystals when in heptahydrate form and in blue crystals when in hexahydrate state.
•    It is odourless.
•    Its molecular weight is 154.75 g/mol.
•    It is having a density of 3.68 g/cm3
•    Its boiling point is 840 °C
•    Its Melting point is > 100 °C in an anhydrous state and >53 °C for hexahydrate form.
•    The linear chemical formula is given as NiSO₄(H₂O)₆
•    It is soluble in water and methanol. Solubility in water is 293 g/L at 0°C.
•    Its CAS registration number is 7786-81-4
•    Though it has a sweet, astringent taste, it is recommended not to taste.

Chemical Properties of NiSO₄

•    It is non-flammable.
•    It is insoluble in alcohol and ether.
•    It is not compatible with strong acids.
•    After dissolving in water, it forms an acidic corrosive solution. On corrosion, it emits fumes of oxides of sulfur.
•    When it is dissolved in water, and the solution is heated to decompose, it liberates fumes of nitrous oxide. Fumes of Nickel Sulphate are highly toxic.
•    As its aqueous solution is acidic, the pH value is 4.5.
•    On heating at 103°C, aqueous Nickel Sulfate loses the water molecules. And heating up to 848°C, the anhydrous form decomposes to form sulfur trioxide and nickel oxide. The chemical expression is
•    NiSO₄→NiO+SO₃
•    Nickel Sulfate gives double by-products of salts on reacting with alkali metals or ammonium sulfates. These sulfates are isomorphous.
•    Reacting with hydrochloric acid gives Sulphuric acid and Nickel Chloride. The chemical reaction is as shown,
•    NiSO₄+HCl→NiCl+HSO₄
•    While reacting with sodium hydroxide, it forms Sodium Sulfate and Nickel hydroxide. The chemical equation is
•    NiSO₄+NaOH→Ni(OH)₂+Na₂SO₄

Uses of Nickel Sulfate

•    As the electrolyte for surface finishing processes of metals such as metal plating and electrorefining.
•    In the preparations of many Nickel catalysts and compounds.
•    As a reducing agent for flashing on steel surfaces, imparting Nickel coating from the surface.
•    For blackening Brass and Zinc.
•    As a mordant in dyeing and printing metals, textiles and ceramics.
•    As a coating for many metals.
•    In the production of driers that are used in protective shields.
•    They are occasionally used as calibrants to measure magnetic susceptibility.