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2,4-dimethylphenylacetaldehyde is a colorless oily liquid. Insoluble in water, soluble in alcohol and oils. Powerful green, but sweet and slightly floral title material. odor of moderate tenacity.

This aldehyde has been suggested for use in perfumery as a modifier for Phenylacetaldehyde in floral fragrances, where a green note is acceptable or desirable. It does not have the penetrating power of Phenylacetaldehyde, but it is sweeter, more floral, less gassy and more tenacious. It is also somewhat more stable towards polymerization.

(1) from 2,4-Dimcthyl phenylglycidic acid by decarboxylation.
(2) from 2,4-Dimethylbenzaldehyde plus Ethyl monochloroacetate via glycidate to the 2,4-dimethylphenylacetaldehyde.