Chemistry:C4H2O4
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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
Original source: https://en.wikipedia.org/wiki/C4H2O4.
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