C3H6O
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The molecular formula C3H6O may refer to:

- Alcohols Allyl alcohol or 2-propen-1-ol, CH2=CH-CH2OH, CAS number cyclopropanol or cyclopropyl alcohol, cyclo (-CH2-CH2-HOHC-), CAS number
- Aldehydes propanal or propionaldehyde, CH3CH2-CHO, CAS number
- Ketones Propanone or acetone, CH3-CO-CH3, CAS number
- Enols (tautomers of aldehydes and ketones) (E)-1-propen-1-ol, CH3-CH=CH-OH, CAS number (Z)-1-propen-1-ol, CH3-CH=CH-OH, CAS number propen-2-ol, CH2=C(OH)-CH3, CAS number or
- Ethers methyl vinyl ether or methoxyethene, H3C-O-CH=CH2, CAS number: oxetane or trimethylene oxide, cyclo(-CH2-CH2-O-CH2-), CAS number: 1,2-epoxy-propane or Propylene oxide or methyl oxirane, cyclo(-C*H(CH3)-CH2-O-), C* chiral, CAS number: (R)-(+)-methyl oxirane, CAS number (S)-(–)-methyl oxirane, CAS number