Ruthenium Oxide

Last updated: June 15, 2017

What Does Ruthenium Oxide Mean?

The most common type of ruthenium oxide, ruthenium (IV) oxide, is an inorganic compound in the form of a black colored solid crystal. This oxide is widely used as an oxygen catalyst in the production of chlorine and chlorine oxides.

There are two types of ruthenium oxide:

  • Ruthenium (IV) oxide having the chemical formula RuO2.
  • Ruthenium (VIII) oxide having the chemical formula RuO4.

Corrosionpedia Explains Ruthenium Oxide

Some properties of ruthenium (IV) oxide:

  • IUPAC name – ruthenium (IV) oxide
  • CAS number – 12036-10-1
  • Chemical formula – RuO2
  • Molar mass – 133.068 gram per mol
  • Appearance – black blue color solid crystal
  • Density – 6.97 gram per cubic cm
  • Boiling point – 1200 °C (2192 °F)
  • Solubility in water – not soluble

Materials made from ruthenium oxide are used to manufacture fuel cell catalysts and are better than non-carbon based materials because ruthenium oxide offers higher corrosion stability.

Ruthenium oxide powders exhibit higher corrosion stability compared to carbon. Full conversion of RuO2nH2O to the RuO2 phase by post reduction in a hydrogen atmosphere leads to improved conductivity and corrosion stability.


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