C2H2O2 Index of chemical compounds with the same molecular formula From Wikipedia, the free encyclopedia The molecular formula C2H2O2 may refer to: Acetylenediol, or ethynediol: Glyoxal: Acetolactone: This set index page lists chemical structure articles associated with the same molecular formula.If an internal link led you here, you may wish to change the link to point directly to the intended article. More information Related molecular formulas ... Related molecular formulas C2H4O2 CO2 C2H2O2 C3H4O2 C2O2 C2H2O C2H2O3 Close Related Articles