C5H6O

The molecular formula C5H6O (molar mass: 82.10 g/mol, exact mass: 82.0419 u) may refer to:


 * Cyclopentenone, or 2-cyclopentenone
 * Methylfuran
 * 2-Methylfuran
 * 3-Methylfuran
 * Pyran, or oxine