Arsenic oxide Arsenic oxide may refer to any of the following: Arsenic dioxide, As2O4 Arsenic trioxide, As2O3 Arsenic pentoxide, As2O5 Arsenious oxide, As4O6 Index of chemical compounds with the same nameThis set index article lists chemical compounds articles associated with the same name.If an internal link led you here, you may wish to change the link to point directly to the intended article.