Irone Alpha, with the CAS number 79-69-6, is a synthetic aroma chemical known for its unique floral and woody characteristics. It is often described as having a violet-like scent, making it a popular choice in perfumery for adding depth and complexity to floral compositions. Irone Alpha is typically used in the heart or base notes of a fragrance, where it can enhance the overall olfactory profile and provide a lasting impression. Its versatility allows it to be incorporated into a wide range of fragrance types, from light and airy florals to more robust woody blends. In terms of safety and regulatory considerations, Irone Alpha is subject to IFRA guidelines, which may impose restrictions on its usage levels in certain applications. As with many synthetic aroma chemicals, it is important for formulators to be aware of potential allergenic properties and to ensure compliance with relevant regulations to ensure consumer safety. — AI-generated summary, 2026-09-02.
A refined, powdery violet-iris aroma with a soft woody undertone. Alpha-irone gives the characteristic warm, dry, slightly sweet orris-root character — elegant and diffusive, less green than beta-irone and more powdery-floral. Signature dry powdery violet facet reminiscent of iris butter.AI · claude-opus-4-7
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Other ingredients whose composition declares this material as a constituent. The percentage shown is the supplier-declared concentration in that parent.
| Ingredient | % | Range |
|---|---|---|
| ORRIS IMPERIAL | — | 10–20% |
Perfume and Flavor Chemicals, page 746.
Colorless or very pale straw-colored oily liquid.
Almost insoluble in water, soluble in alcohol and oils.
The odor is soft, warm, Orris-Violet-like, sweet and extremely diffusive.
The taste is sweet, very powerful and, in proper dilution, fruity-berry-like.
Its true power and effect is clearly demonstrated in dilutions or in active use at concentrations near one percent in a perfume composition. The lift and the radiance introduced by this ketone are its greatest assets and advantages to compensate for its high cost.
Particularly useful in Raspberry, it is frequently used in other Berry formulations, in fruit complexes, floral (Violet) flavors, etc.
1) By isolation from the volatile oil of Orris rhizomes. 2) From 2,3-Dimethylhepten-2-one-6, by addition of Acetylene, followed by partial hydrogenation, via 5-Methylgeraniol or related chemicals to Pseudo-irone.