CH2O2

The molecular formula CH₂O₂ (molar mass: 46.03 g/mol) may refer to:

• Dihydroxymethylidene
• Dioxirane, an unstable cyclic peroxide
• Formic acid, an organic acid
• Methylenedioxy, a functional group
• Molar Mass of 46g/mol rounded to the nearest whole number