ɹuːθˈiːniəm ɹˌoʊmən fˈoːɹ ˈɑːksaɪd ɪz bˌiːɪŋ jˈuːzd æz ðə mˈeɪn kəmpˈoʊnənt ɪnðə kˈæɾɐlˌɪst ʌvðə sˌuːmɪtˈoʊmoʊdˈiːkən pɹˈɑːsɛs wˌɪtʃ pɹədˈuːsᵻz klˈoːɹiːn baɪ ðɪ ˌɑːksɪdˈeɪʃən ʌv hˈaɪdɹədʒən klˈoːɹaɪd.
Ruthenium(IV) oxide is being used as the main component in the catalyst of the Sumitomo-Deacon process which produces chlorine by the oxidation of hydrogen chloride.