tɹˈaɪəksˌɪdeɪn sˌɪstəmˈæɾɪkli nˈeɪmd daɪhˈaɪdɹədʒən tɹaɪˈɑːksaɪd,, ˈɔːlsoʊ kˈɔːld hˈaɪdɹədʒən tɹaɪˈɑːksaɪd ɪz ɐn ˌɪnoːɹɡˈænɪk kˈɑːmpaʊnd wɪððə kˈɛmɪkəl fˈɔːɹmjʊlə kæn biː ɹˈɪʔn̩ æz ɔːɹ.
Trioxidane (systematically named dihydrogen trioxide,), also called hydrogen trioxide is an inorganic compound with the chemical formula  (can be written as  or ).