Article · Wikipedia archive · Last revised Jun 23, 2026

C2H2O

The molecular formula C2H2O (molar mass: 42.04 g/mol, exact mass: 42.0106 u) may refer to:Ethenone, or ketene Ethynol, or hydroxylacetylene Oxirene

Last revised

Jun 23, 2026

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Related molecular formulas
	C₂H₄O
CO	C₂H₂O	C₃H₄O
	C₂O
C₂H₂		C₂H₂O₂

The molecular formula C₂H₂O (molar mass: 42.04 g/mol, exact mass: 42.0106 u) may refer to:

Ethenone, or ketene
Ethynol, or hydroxylacetylene
Oxirene