The molecular formula C4H6O2 may refer to:

Butenoic acids

• But-3-enoic acid

• Crotonic acid

• Isocrotonic acid

• 1,4-Butynediol

Butyrolactones

• β-Butyrolactone

• γ-Butyrolactone

• Diacetyl, or butanedione

• Diepoxybutane

• 1,4-Dioxene

• Formyl acetone, technically , but it only exists as a salt of the enol, sodium formyl acetone.

• Methacrylic acid

• Methyl acrylate

• Succinaldehyde

• Vinyl acetate

References