Noun
English Wikipedia has an article on:ruthenium tetroxideWikipedia
ruthenium tetroxide (uncountable)
(inorganic chemistry) The compound RuO4
Ruthenium tetroxide and osmium tetroxide are both volatile, due to their symmetrical tetrahedral molecular geometry and their being charge-neutral; hassium tetroxide should similarly be a very volatile solid. Source: Internet
Ruthenium tetroxide exposes latent fingerprints by reacting on contact with fatty oils or fats with sebaceous contaminants and producing brown/black ruthenium dioxide pigment. Source: Internet