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3-(4-Ethylphenyl)-2,2-dimethylpropionaldehyde is a colorless to pale yellow liquid, which exists as the main isomer (60–80%) in the product consisting of an ortho isomer (15–35%) and a meta isomer (ca. 5%). It is prepared by condensation of 1-chloromethyl-4-ethylbenzene (tech.) with isobutyraldehyde in the presence of a phase transfer catalyst. The odor of 3-(4-ethylphenyl)-2,2-dimethylpropionaldehyde is described as: floral, muguet, aldehydic, ozonic, powerful, clean, with a fresh air tone reminiscent of ocean breeze.
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