Iridium compounds: iridium tribromide tetrahydrate

iridium symbol icon

The iridium in iridium tribromide tetrahydrate formally is in the oxidation state 3.

Iridium tribromide tetrahydrate

  • Formula as often written: IrBr3.4H2O
  • Hill system formula: Br3H8Ir1O4
  • CAS registry number: [10049-24-8]
  • Formula weight: 503.99
  • Class: complex


  • iridium tribromide tetrahydrate
  • iridium(III) bromide 4-water
  • iridium bromide 4-water

Physical properties

  • Colour: green-brown
  • Appearance: crystalline solid
  • Melting point:
  • Boiling point:
  • Density:


Coming soon...

Element analysis

Element percentages for the elements in iridium tribromide tetrahydrate
Element %
Br 47.56
H 1.60
Ir 38.14
O 12.70


Not available

Isotope pattern

What follows is the calculated isotope pattern for the IrBr3.4H2O unit with the most intense ion set to 100%.

Formula: Ir1Br3H8O4

mass  %
500  12.8 ______
501 0.0
502 59.2 ______________________________
503 0.1
504 100.0 __________________________________________________
505 0.2
506 74.0 _____________________________________
507 0.2
508 20.5 __________
509 0.0
510 0.2


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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iridium atomic number