C3H4O4
# C3H4O4

The molecular formula $C_3H_4O_4$ (molar mass: 104.06 g/mol) may refer to:

* Glycerol carbonate, a cyclic carbonate ester
* Hydroxypyruvic acid, a pyruvic acid derivative
* Malonic acid, a dicarboxylic acid
* Tartronic acid semialdehyde, the uronic acid of glyceraldehyde
* Monomethyl oxalate, a compound that cannot be isolated but is an intermediate in synthesizing or hydrolyzing dimethyl oxalate
