Copper compounds: copper sulphate pentahydrate

copper symbol icon

The copper in copper sulphate pentahydrate formally is in the oxidation state 2.

Crystal structure of copper sulphate pentahydrate

Copper sulphate pentahydrate

  • Formula as often written: CuSO4.5H2O
  • Hill system formula: Cu1H10O9S1
  • CAS registry number: [7758-99-8]
  • Formula weight: 249.686
  • Class: complex


  • copper sulphate pentahydrate
  • copper(II) sulphate 5-water
  • Roman vitriol
  • Salzburg vitriol
  • blue vitriol
  • copper sulfate 5-water
  • copper sulfate pentahydrate
  • copper sulphate 5-water
  • copper(II) sulfate 5-water
  • cupric sulfate 5-water
  • cupric sulphate 5-water

Physical properties

  • Colour: blue, greenish blue
  • Appearance:
  • Melting point: 30°C and 110°C (dehydrates)
  • Boiling point:
  • Density: 2286 kg m-3


Coming soon...

Element analysis

Element percentages for the elements in copper sulphate pentahydrate
Element %
Cu 25.45
H 4.04
O 57.67
S 12.84


Not available

Solid state structure

  • Geometry of copper:
  • Prototypical structure:

Crystal structure of copper sulphate pentahydrate

Isotope pattern

What follows is the calculated isotope pattern for the CuSO4.5H2O unit with the most intense ion set to 100%.

Formula: Cu1S1O9H10

mass  %
249 100.0 __________________________________________________
250 1.3 _
251 50.8 _________________________
252 0.6
253 2.9 _
254 0.0
255 0.1


The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.

  • R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960.
  • N.N. Greenwood and A. Earnshaw in Chemistry of the Elements, 2nd edition, Butterworth, UK, 1997.
  • F.A. Cotton, G. Wilkinson, C.A. Murillo, and M. Bochmann, in Advanced Inorganic Chemistry, John Wiley & Sons, 1999.
  • A.F. Trotman-Dickenson, (ed.) in Comprehensive Inorganic Chemistry, Pergamon, Oxford, UK, 1973.
  • R.W.G. Wyckoff, in Crystal Structures, volume 1, Interscience, John Wiley & Sons, 1963.
  • A.R.West in Basic solid state chemistry Chemistry, John Wiley & Sons, 1999.
  • A.F. Wells in Structural inorganic chemistry, 4th edition, Oxford, UK, 1975.
  • J.D.H. Donnay, (ed.) in Crystal data determinative tables, ACA monograph number 5, American Crystallographic Association, USA, 1963.
  • D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
  • J.W. Mellor in A comprehensive treatise on inorganic and theoretical chemistry, volumes 1-16, Longmans, London, UK, 1922-1937.
  • J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992.

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copper atomic number