C2HNO2 Index of chemical compounds with the same molecular formula From Wikipedia, the free encyclopedia The molecular formula C2HNO2 (molar mass: 71.03 g/mol, exact mass: 71.0007 u) may refer to: Carbonocyanidic acid Formyl cyanate (Hydroxyimino)ethenone HONCCO 2-Nitrosoethenone ONC(H)CO Oximide 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 C2H3NO2 C2HNO2 C3H3NO2 C2HNO C2HNO3 C2O2 C2H2N2O2 Close Related Articles