C3H4O2
# C3H4O2

$C_3H_4O_2$ may refer to:

Compounds sharing the molecular formula:

* Acrylic acid
* Malondialdehyde
* Methylglyoxal
* 3-Oxetanone
* Propiolactone isomers:
   * Alpha-Propiolactone (α-propiolactone)
   * Beta-Propiolactone (β-propiolactone)
