Characteristic

Copper(II) sulfate, also known as copper sulphate, are the inorganic compounds with the chemical formula CuSO₄(H₂O)_x, where x can range from 0 to 5. The pentahydrate (x = 5) is the most common form. 

Chemical formula：CuSO₄ (anhydrous)    CuSO₄·5H₂O (pentahydrate)

Molar mass：159.609 g/mol (anhydrous)    249.685 g/mol (pentahydrate)

Appearance：gray-white (anhydrous)    blue (pentahydrate)

Density：3.60 g/cm³ (anhydrous)    2.286 g/cm³ (pentahydrate)

Melting point：110 °C (230 °F; 383 K) decomposes (·5H2O) if pentahydrate

                         <560 °C decomposes if anhydrous

Boiling point：decomposes

Solubility in water：1.055 molal (10 °C)     1.26 molal (20 °C)     1.502 molal (30 °C)

Solubility：anhydrous   insoluble in ethanol    pentahydrate

                   soluble in methanol   10.4 g/L (18 °C)    insoluble in ethanol, insoluble in acetone

Magnetic susceptibility (χ):+1330·10⁻⁶ cm³/mol

Refractive index (nD):1.724–1.739 (anhydrous)    1.514–1.544 (pentahydrate)

Crystal structure：Orthorhombic 

Application

Copper sulfate is an important raw material for preparing other copper-containing compounds.Bordeaux liquor can be mixed with lime milk and used as fungicide.Also used in the electrolysis of refined copper electrolyte.