A soft, warm violet-orris floral with a dry woody undertone. Beta-n-Methyl Ionone leans more woody and less overtly fruity than the alpha isomer, giving a refined, slightly powdery violet character with good persistence. Rounded and elegant rather than sharp.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 895.
Almost colorless or pale straw-colored oily liquid.
Insoluble in water, soluble in alcohol and oils.
Woody-warm odor, generally considered to be a beta-Ionone type.
This isomer is the least important of the commonly available Methylionones. Its odor type does not tempt the perfumer to use it very extensively, particularly since beta-Ionone is commercially available at a very attractive price, being an intermediate in the manufacture of synthetic Vitamin A.
It finds a little use in flavor compositions, partly as a modifier for beta-Ionone in Raspberry imitations, also in Strawberry and other berries, Orange and other Citrus imitations, Violet and other floral types and in certain fruit complexes.
Produced by condensation of Citral with Methyl ethyl ketone, followed by cyclization. Solvents and acids used in the cyclization process will largely influence the proportion of beta-isomer in the yield.