Mesityl oxide

Mesityl oxide

[mez-i-til, mes-]

Mesityl oxide is a α,β-Unsaturated ketone with the formula CH3C(O)CH=C(CH3)2. This compound is a colorless, volatile liquid with a strong peppermint odor.


It is prepared by the condensation of acetone to give diacetone alcohol, which readily dehydrates to give this compound. This type of reaction is called aldol reaction.

A further condensation yields isophorone, which is also used as solvent.


Mesityl oxide is used as a solvent and in the production of methyl isobutyl ketone.


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