C4H6O2

The molecular formula C₄H₆O₂ may refer to:

• 1,4-Butynediol
• Butyrolactones
  • β-Butyrolactone
  • γ-Butyrolactone
• Crotonic acid
• Diacetyl, or butanedione
• Diepoxybutane
• 1,4-Dioxene
• Isocrotonic acid
• Methacrylic acid
• Methyl acrylate
• Succinaldehyde
• Vinyl acetate
• Butenoic acid
• Formyl acetone, technically CH₃(C=O)CH₂CHO, but it only exists as a salt of the enol, sodium formyl acetone.