C2HNO2
# C2HNO2

The molecular formula $C_2HNO_2$ (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
