C4H2O4
| Related molecular formulas | ||
|---|---|---|
| C4H4O4 | ||
| C3O4 | C4H2O4 | C5H4O4 |
| C4O4 | ||
| C4H2O3 | C4H2O5 | |
The molecular formula C4H2O4 (molar mass: 114.06 g/mol, exact mass: 113.9953 u) may refer to:
- Acetylenedicarboxylic acid, or butynedioic acid
- Squaric acid, or quadratic acid