Mesityl Oxide

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Related to Mesityl Oxide: dimedone

mesityl oxide

[′mez·ə‚til ′äk‚sīd]
(organic chemistry)
(CH3)2C=CHCOCH3 A colorless, oily liquid with a honeylike odor; solidifies at -41.5°C; used as a solvent for resins, particularly vinyl resins, many gums, and nitrocellulose; also used in lacquers, paints, and varnishes.

Mesityl Oxide


an unsaturated aliphatic ketone, (CH3)2=CH—CO—CH3; a colorless liquid with a strong odor of mint. Boiling point, 128.3°C; density, 0.8548 g/cm3 at 20°C.

Mesityl oxide is miscible with organic solvents and reacts with water to form an azeotrope (65.2 percent mesityl oxide; boiling point, 91.8°C). It is prepared commercially by dehydration of diacetone alcohol, (CH3)2C(OH)CH2COCH3, under the action of, for example, traces of iodine or inorganic acids; it may also be obtained from acetone. It is used as a solvent for cellulose nitrate, ethyl cellulose, and polyvinyl chloride. It has a weak irritating and narcotic effect.

References in periodicals archive ?
Twenty four different chemical compounds were identified and quantified from the oil, where cyclohepta-1,3,5,-triene(16.07%),2H-1,4pyridoxazin-3(4H)-one (12.27%), L-carvenol (8.04%), p-cymene (9.15%), a-terpineol (7.98%), b-sitosterol (6.76%), tyranton (6.42%), mesityl oxide (6.34%), -terpinene (5.42%) and b-linalool (3.74%) etc.
the aldol condensation of acetone to diacetone alcohol which undergoes subsequent dehydration to mesityl oxide, and
of acetone to diacetone alcohol with the subsequent dehydration of the diacetone alcohol to yield mesityl oxide over an acidic ion exchange resin catalyst.