Soft, powdery violet-orris character with a warm woody undertone. Creamy, slightly sweet and elegant, evoking iris and violet petals with a subtle cedar-like dryness. Rounder and more floral than the alpha-n-methyl ionone, with excellent skin-like smoothness.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 894.
Almost colorless or pale straw-colored oily liquid.
Insoluble in water, soluble in alcohol and oils.
The odor of this isomer is generally considered more attractive than any other Methylionone, perhaps with the exception of the beta-iso-Methylionone, so-called delta-Methylionone. It is extremely versatile in character, and effects ranging from sweet floral to tobacco-like or woody are obtainable with various grades of subject material. The most refined grades, which are quite expensive, often show a very attractive creamy top-note and a most uniform, powdery-sweet dryout performance. This type of Methylionone can support floral notes in Ylang-Ylang as well as woody notes in Vetiver, or leathery notes in Salicylates, etc.
The subject material finds some use in flavor compositions, not only in many berry types and Violet and other florals, but in Pineapple, Muscatel, Nut, Pistachio, fruit complexes, etc.
Certain types of perfume contain up to 25% or more of this material. Many soap perfumes are based upon a large volume of common-grade Methylionone with the subject isomer as predominant component.
Produced by condensation of Citral with Methyl ethyl ketone, followed by cyclization of the Pseudomethylionone. Variations in the second step largely control the ratio of isomers in the Methylionone.