Alpha-ionone: colorless to pale yellow clear liquid. Violet flower absolute: greenish olive viscous liquid. Violet leaf absolute: dark green viscous liquid.
Odor Strength
High
Producing Countries
France (Grasse, Tourrettes-sur-Loup), Italy (Parma), Egypt, China
Pyramid
Heart
Powdery, sweet, faintly woody — and entirely synthetic. The violet flower yields almost no usable extract; the scent we call 'violet' is built from ionone molecules first synthesized in 1893, structurally closer to cedarwood than to any petal.
Less mineral than orris, less green than violet leaf, sweeter and softer than cedar despite sharing structural kinship. Alpha-ionone opens with a powdery, berry-like sweetness — raspberry-adjacent, with a dry floral transparency that sits closer to face powder than to garden petals. Beta-ionone is woodier, drier, almost sepia-toned: old books and dried flowers pressed between pages. Methyl ionones add body and warmth, pushing the accord toward suede.
On skin, ionones exhibit a well-documented anosmia effect: the nose loses the ability to detect them after a few minutes of exposure, only to rediscover them abruptly when olfactory receptor sensitivity resets. The scent appears to flicker — present, absent, present again. This perceptual instability is specific to the ionone family and has no equivalent among other aroma chemicals.
Evolution over time
Immediately
Immediately
Sweet, powdery, faintly berry-like. Alpha-ionone's raspberry-floral character dominates the opening, with a dry violet transparency and a brief burst of fruity brightness.
After a few hours
After a few hours
Woodier, warmer. Beta-ionone and methyl ionones surface — less floral, more suede-like, with a retro powdery quality that recalls face powder and old confections. The anosmia effect begins to cycle.
After a few days
After a few days
A soft, warm, woody-powdery trace. The moderate molecular weight of ionones (MW 192) provides decent tenacity on fabric, though the cyclical anosmia may obscure perception on skin.
Terroir & Origins
Indicative 2025 wholesale prices.
The Full Story
The violet flower (Viola odorata) produces an absolute so vanishingly rare that it effectively disappeared from commercial perfumery by the early 1960s. A violet flower absolute does technically exist — CAS 8024-08-6, obtained by alcohol-washing a petroleum ether concrete of the flowers — but yields are microscopic and production is limited to a handful of artisan distillers. The scent that perfumers call 'violet' is, in practice, a synthetic construction built from ionones.
Ionones are a family of terpenoid ketones first synthesized in 1893 by Ferdinand Tiemann and Paul Krüger. The process is elegantly simple: an aldol condensation of citral with acetone produces pseudoionone, which is then cyclized under acidic conditions. The type of acid determines the product — weaker acids (phosphoric, fumaric) favor alpha-ionone (CAS 127-41-3, C₁₃H₂₀O), while concentrated sulfuric acid yields beta-ionone (CAS 14901-07-6, C₁₃H₂₀O). Both are C13 ketones with a molecular weight of 192.3 g/mol, but they smell distinctly different.
Alpha-ionone is the more classically 'violet' of the two: powdery, sweet, with a raspberry-adjacent fruitiness and dry floral transparency. Beta-ionone is woodier, drier, almost sepia-toned — dried flowers and old paper. Their methylated derivatives — the methyl ionones, particularly alpha-isomethyl ionone (CAS 127-51-5, C₁₄H₂₂O) — add body, warmth, and an orris-like richness. Alpha-isomethyl ionone is the most common ionone in contemporary use and must be declared on EU labels as a potential allergen.
Violet leaf absolute is a separate material entirely. Extracted by solvent from Viola odorata leaves, it smells nothing like the flower — intensely green, watermelon-like, almost metallic. The disconnect between violet leaf and violet flower is one of perfumery's sharpest material ironies.
Ionones share a structural relationship with irones, the molecules responsible for the scent of orris root (Iris pallida). Both are terpenoid ketones derived from carotenoid degradation — which is why violet and iris notes blend so naturally and are routinely confused even by trained noses. This kinship makes ionones essential building blocks for orris substitution, a practical necessity given that natural orris butter costs upward of EUR 40,000 per kilogram.
This note in Première Peau.Albâtre Sépia · Doppel Dänçers · Nuit Elastique · Rose Monotone. Sample all seven extraits in the Discovery Set.
Ionones cause a unique form of temporary anosmia: after a few minutes of exposure, the olfactory receptors that detect them become desensitized, and the scent appears to vanish entirely. Seconds or minutes later, receptor sensitivity resets and the violet smell returns abruptly. This flickering perception — present, absent, present — is specific to the ionone family and has no known parallel among other aroma chemicals. It may explain violet's long-standing poetic association with shyness, modesty, and things half-seen.
Extraction & Chemistry
Extraction method: Violet flower: a true absolute exists (CAS 8024-08-6), obtained by alcohol-washing a petroleum ether concrete of Viola odorata flowers. Production nearly vanished by the 1960s due to microscopic yields and extreme cost. Today, only a few artisan houses offer violet flower extrait, typically via enfleurage. The material is effectively absent from commercial perfumery.
Violet scent reconstruction: built synthetically from ionones. Alpha-ionone (CAS 127-41-3): powdery, raspberry-like, floral. Beta-ionone (CAS 14901-07-6): woodier, drier. First synthesized in 1893 by Tiemann and Krüger via aldol condensation of citral with acetone, followed by acid-catalyzed cyclization.
Violet leaf: solvent extraction of Viola odorata leaves produces an absolute (CAS 8024-08-6) that smells intensely green and watermelon-like — a completely different olfactory profile from the flower.
Alpha-ionone: colorless to pale yellow clear liquid. Violet flower absolute: greenish olive viscous liquid. Violet leaf absolute: dark green viscous liquid.
Flash Point
> 230.00 °F. TCC ( > 110.00 °C. )
Specific Gravity
0.92700 to 0.93300 @ 25.00 °C.
Refractive Index
1.49700 to 1.50200 @ 20.00 °C.
In Perfumery
Ionone-based violet functions across heart and base positions depending on the specific molecule. Alpha-ionone provides soft, powdery florality in the heart — its raspberry quality makes it useful in fruity-floral accords. Beta-ionone contributes woody-floral dryness. Methyl ionones, particularly alpha-isomethyl ionone (CAS 127-51-5), add volume and tenacity in the drydown, and are the workhorses of modern violet and iris compositions. The ionone family is structurally essential to several fragrance genres: classic powdery florals, iris compositions (where ionones extend and support natural irones at a fraction of the cost), fruity florals, and woody-powdery masculines. As blending tools, ionones smooth sharp edges and add a velvety, suede-like texture to surrounding materials. Violet leaf absolute (distinct from ionone-based violet flower) functions as a green modifier — its metallic, watery character complements galbanum, green herbs, and cucumber accords.
