Price: 640 INR/Kilograms
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 103C, aqueous Nickel Sulfate loses the water molecules. And heating up to 848C, the anhydrous form decomposes to form sulfur trioxide and nickel oxide. The chemical expression is
NiSO4NiO+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+HClNiCl+HSO4