The molecular formula C₈H₈O (molar mass: 120.15 g/mol, exact mass: 120.057515 u) may refer to:

• Acetophenone
• Methylbenzaldehydes
  • 2-Methylbenzaldehyde
  • 3-Methylbenzaldehyde
  • 4-Methylbenzaldehyde
• Phenylacetaldehyde
• Styrene oxide
• 4-Vinylphenol
• Oxonine

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