Spun sugar made airborne. A white powder that smells like a carnival midway — cotton candy, strawberry jam still bubbling in the pan, caramel hardening on wax paper. Entirely synthetic, with no meaningful natural counterpart.
Pure crystalline sweetness — cott on candy, caramelized sugar, strawberry jam still warm in the jar. Sweeter than vanill in, less powdery than heliotrop in, more caramellic and jammy than maltol. No complexity, no darkness, no green or woody qualities. Where maltol smells like toasted bread crust and roasted malt, ethyl maltol is the carnival — pink, spun, airborne sugar. At a blotter test, a detectable cott on-candy haze persists beyond 72 hours.
Evolution over time
Immediately
Immediately
Instant cotton-candy blast — burnt sugar, caramelized strawberry, a pink cloud of spun sugar that projects outward and fills the room
After a few hours
After a few hours
The carnival recedes. Toffee and warm caramel dominate, with a fruity-jammy undertone (strawberry preserve, cooked fruit). Less aggressive, more rounded, clinging close to skin
After a few days
After a few days
A soft, powdery-sweet residue — vanillic warmth, faint sugar dust, the ghost of caramel on fabric. Remarkably persistent given its apparent simplicity
The Full Story
Ethyl maltol (CAS 4940-11-8, C₇H₈O₃, MW 140.14) is a white crystalline powder with an overwhelmingly sweet, caramellic odor. It was first disclosed in a 1969 Pfizer patent under the trade name Veltol Plus. The molecule is 2-ethyl-3-hydroxy-4H-pyran-4-one — structurally identical to maltol (CAS 118-71-8) except for an ethyl group replacing the methyl at position 2. That single carbon addition drops the odor threshold by roughly tenfold. Ethyl maltol registers on the nose at concentrations below 10 parts per billion.
The smell is uncomplicated: cott on candy, burnt sugar, strawberry jam, toffee. Sweeter than maltol by a factor of four to six, with a more pronounced fruity-jammy quality and less of maltol's toasted, bready character. At low concentrations it reads as warm, rounded, comforting. At higher doses it becomes cloying and one-dimensional — a wall of sugar with nowhere to go.
Ethyl maltol does not occur in nature in any meaningful quantity. Maltol — its parent compound — is found in larch bark, roasted malt, pine needles, and the crust of fresh bread, but ethyl maltol is a purely industrial product. Modern production follows two principal routes: the furfural pathway (furfural reacted with ethylmagnesium bromide to yield alpha-ethylfurfuryl alcohol, then oxidized with chlorine and hydrolyzed) and the komenic acid pathway (decarboxylation of kojic acid, aldol addition with acetaldehyde, reduction). China dominates global production.
In perfumery, ethyl maltol functions as a modifier, not a standalone note. It sweetens, softens, and rounds whatever it touches by suppressing bitter and sharp qualities while amplifying warm and sweet ones. A fracti on of a percent in a woody formul a transforms dry cedar into cashmere warmth. In a fruity compositi on, it pushes fresh fru it toward candy. In an amber, it deepens the ambery-vanillic core into full gourm and territory. Its exceptionally low odor threshold — not high vap or pressure, as sometimes erroneously claimed — gives compositions containing ethyl maltol a perceptible sweetness that projects outward, creating the sillage trails that define the gourm and family.
Pfizer patented ethyl maltol in 1969 under the trade name Veltol Plus, initially as a food flavor enhancer — not a perfumery ingredient. It sat in the food industry for over two decades before a perfumer used an unprecedented 0.5% concentration in a fine fragrance in 1992, an enormous dose for a molecule perceptible below 10 ppb. The result was so divisive that multiple focus groups rejected it as 'too sweet' and 'food-like.' It went on to define an entirely new olfactory category — the gourmand — and remains one of the best-selling feminine fragrance archetypes ever created.
Extraction & Chemistry
Extraction method: Entirely synthetic. No extraction from natural sources. Two principal industrial routes exist. The furfural pathway: furfural is reacted with ethylmagnesium bromide (a Grignard reagent) to yield alpha-ethylfurfuryl alcohol, which is oxidized with chlorine in methanol at 0°C, then hydrolyzed at 100°C to yield ethyl maltol. The komenic acid pathway: kojic acid is oxidized to comenic acid, decarboxylated to pyromeconic acid, then subjected to aldol addition with acetaldehyde and reduction. Yields range from 35% (furfural route) to 70-90% (komenic acid route). A more recent one-pot synthesis directly from maltol has also been described. The product crystallizes as a white powder, mp 89-93°C, soluble in hot water and ethanol. China is the dominant global producer.
Molecular Formula
C7H8O3
CAS Number
4940-11-8
Botanical Name
N/A — synthetic molecule
IFRA Status
Restricted — IFRA recommends max 4% in fragrance concentrate
Synonyms
2-ETHYL-3-HYDROXY-4H-PYRAN-4-ONE · ETHYL PYROMECONIC ACID · VELTOL PLUS
Physical Properties
Odor Strength
High
Lasting Power
360 hours
Appearance
white crystalline powder
Boiling Point
289.00 to 290.00 °C. @ 760.00 mm Hg
Flash Point
> 200.00 °F. TCC ( > 93.33 °C. )
Melting Point
89.00 to 93.00 °C. @ 760.00 mm Hg
In Perfumery
Ethyl maltol is a sweetening modifier and diffusion enhancer, not a standalone note. It operates at high dilution — typically well below 1% of a formula — because its odor threshold sits below 10 ppb. At those concentrations it sweetens, softens edges, and adds a transparent caramellic veil without declaring itself. Overdose it and the composition collapses into candy. The molecule's primary role is in gourmand and amber compositions, where it works alongside vanillin (CAS 121-33-5) and ethyl vanillin (CAS 121-32-4) to build the edible warmth that defines the family. Combined with gamma-decalactone, it produces a peach-candy effect. Blended with coumarin, it amplifies the hay-sweet tonka character. Paired with Iso E Super, it softens woody dryness into a cashmere finish. Beyond gourmands, it appears in fruity florals (pushing fresh fruit toward confectionery) and in some contemporary ouds (rounding the animalic harshness). Its substantivity — 360 hours at 20% per TGSC data — places it functionally in the heart-to-base range despite its intense initial projection. IFRA recommends a maximum of 4% in fragrance concentrate.
