The molecular formula C9H6O6 may refer to:
- Hemimellitic acid (benzene-1,2,3-tricarboxylic acid)
- Trimellitic acid (benzene-1,2,4-tricarboxylic acid)
- Trimesic acid (benzene-1,3,5-tricarboxylic acid)
This set index page lists chemical structure articles associated with the same molecular formula.
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