Ruthenium is a chemical element with symbol Ru and atomic number 44.



  • Most ruthenium produced is used in wear-resistant electrical contacts and thick-film resistors. A minor application for ruthenium is in platinum alloys and as a chemistry catalyst.


  • Small amounts of ruthenium are used to harden platinum and palladium and it can also be alloyed with these metals to make electrical contacts for severe wear resistance.
  • The addition of 0.1% ruthenium improves the corrosion resistance of titanium a hundred times over.
  • Ruthenium has catalytic properties; for example, hydrogen sulfide can be split by light in the presence of an aqueous suspension of cadmium sulfide particles loaded with ruthenium dioxide.
  • Interestingly, ruthenium is used in some Parker pen nibs, such as the Parker 51 whose nib is marked ‘RU’, and consists of 96.2% ruthenium and 3.8% iridium(2).


  • Ruthenium is a suspected carcinogen and its compounds strongly stain the skin. Ruthenium tetroxide (RuO4) is highly toxic.


Unknown, please consult with your doctor.

Other names



Source: Wikipedia,


Leave a Reply

Has this product helped you or someone you know? Tell us about it:

Note: Your email address will be kept private, and will NOT show with your statement.