C9H6O2

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C9H6O2 is a molecular formula. It represents any compound that has nine carbons, six hydrogens, and two oxygens. Its molar mass is about 146.14 g/mol, and the exact mass is 146.036779 u. Because different structures can share this formula, C9H6O2 may refer to several possible compounds (isomers). To identify the exact substance, you need more information such as the structure, the IUPAC name, or spectroscopic data.