{{DISPLAYTITLE:C<sub>2</sub>H<sub>2</sub>O<sub>2</sub>}}{{Related molecular formulas|C=2|H=2|O=2}} The [[molecular formula]] '''C<sub>2</sub>H<sub>2</sub>O<sub>2</sub>''' may refer to:
* [[Acetylenediol]], or ethynediol: [[File:Ethyne-1,2-diol.svg|frameless|upright=0.424|alt=HO-C2-OH]] * [[Glyoxal]]: [[File:Structural_formula_of_glyoxal.svg|frameless|upright=0.139|alt=(COH)2]] * [[Acetolactone]]: [[Image:Acetolactone-2D.png|frameless|upright=0.148|alt=H2C(O)CO]]
{{Molecular formula index}}