Nickel(II) sulfate hexahydrate (NiSO4•6H2O)-Powder

Characteristic

Nickel(II) sulfate, or just nickel sulfate, usually refers to the inorganic compound with the formula NiSO₄(H₂O)₆. This highly soluble blue green coloured salt is a common source of the Ni2+ ion for electroplating.

Chemical formula:NiSO₄

Molar mass:154.75 g/mol (anhydrous);262.85 g/mol (hexahydrate);280.86 g/mol (heptahydrate)

Appearance:yellow solid (anhydrous);blue crystals (hexahydrate);green-blue crystals (heptahydrate)

Odor:odorless

Density:4.01 g/cm³ (anhydrous);2.07 g/cm³ (hexahydrate);1.948 g/cm³ (heptahydrate)

Melting point:> 100 °C (anhydrous);53 °C (hexahydrate)

Boiling point:840 °C (1,540 °F; 1,110 K) (anhydrous, decomposes)

100 °C (hexahydrate, decomposes)

Solubility in water:65 g/100 mL (20 °C);77.5 g/100 mL (30 °C) (heptahydrate)

Solubility:anhydrous:insoluble in ethanol, ether, acetone；hexahydrate:insoluble in ethanol, ammonia；heptahydrate:soluble in alcohol

Acidity (pKa):4.5 (hexahydrate)

Magnetic susceptibility (χ):+4005.0·10⁻⁶ cm³/mol

Refractive index (nD):1.511 (hexahydrate);1.467 (heptahydrate)

Crystal structure:cubic (anhydrous);tetragonal (hexahydrate);rhombohedral (hexahydrate)

Application

It is the precursor material for Ni electroplating. It is applied in biochemistry and also employed as a calibrant for magnetic susceptibility measurements.