Lily-of-the-Valley

SyntheticFLOWERSfloral · fresh · sweet

HeartPyramid

3/5Strength

—Tenacity

1Origins

Specimen

Lily-of-the-Valley perfume ingredient — Heart

Convallaria majalis

Definition

The smell of a shaded garden path in early May — cool, waxy, green, faintly metallic, gone before you can place it. No flower in perfumery is more famous or more absent: the scent exists only as a synthetic reconstruction.

FLORAL GREEN SWEET POWDERY FRESH

MUGUET MAY LILY CONVALLARIA

Instruments

Pyramid

TTop

HHeart

BBase

3/5Strength

Medium

odour strength

Producing countries

Manufactured globally

Scent

Cool, green, and waxy — like pressing your face into a cold white bell-shaped flower still wet from overnight dew. There is a metallic shimmer underneath, almost aqueous, that sets muguet apart from every other white floral. Less narcotic than tuberose, sharper than gardenia, with none of jasmine's indolic sultriness.

The green-stem quality is always present — vegetal, slightly bitter, like snapped celery or crushed fern. In synthetic accords, the balance shifts depending on which molecules dominate: hydroxycitronellal pushes toward dewy sweetness, Bourgeonal toward watery transparency, Lilyflore toward soapy clean volume. The overall impression is spring air trapped in a glass — bright, ephemeral, and almost painfully clean.

The Full Story

Lily of the valley (Convallaria majalis) is perfumery's most celebrated ghost. The flower is intensely fragrant in the garden, but its scent cannot be captured by any commercially viable extraction method. Steam distillation destroys the delicate volatiles. Solvent extraction and CO₂ yield trace amounts too small for production. Headspace analysis of living flowers reveals benzyl alcohol (roughly 35% of volatile emissions), (Z)-3-hexen-1-ol (11%), citronellol (9.6%), geraniol (8.4%), farnesol (1.9%), and 2,3-dihydrofarnesol (0.88%) — but these compounds are generated and released in real time by the flower; they are not stored in the tissue, which is why post-harvest extraction fails.

Muguet in perfumery is therefore always a synthetic accord. Hydroxycitronellal (CAS 107-75-5), first commercialised between 1905 and 1908 by Knoll & Co., was the breakthrough — a dewy, aqueous floral aldehyde that suggested lily of the valley convincingly enough to anchor entire compositions. Robert Bienaimé used it at approximately 2.5% in Quelques Fleurs (Houbigant, 1912), the first true multi-floral bouquet, where it supplied the muguet heart that bound rose, jasmine, and ylang-ylang together.

Through the twentieth century, a family of muguet molecules accumulated. Lilial (butylphenyl methylpropional, CAS 80-54-6) offered a cleaner, more powerful variant. Lyral (HICC, CAS 31906-04-4) added a linden-blossom quality. Bourgeonal (CAS 18127-01-0) brought watery freshness. Each captured a different aspect of the flower — the green stem, the waxy bell, the cold-air transparency — and perfumers blended them to build layered muguet accords.

Regulatory action dismantled much of this toolkit. Lyral was banned in the EU under Regulation 2017/1410, with market withdrawal completed by August 2021 — classified as a potent skin sensitiser. Lilial followed: classified CMR 1B (presumed reproductive toxin) and prohibited in EU cosmetics from 1 March 2022 under Regulation 2021/1902. These two bans forced the simultaneous reformulation of hundreds of fragrances. Nympheal (3-[2-methyl-4-(2-methylpropyl)phenyl]propanal), a biodegradable muguet aldehyde positioned as a Lilial successor, has also entered the modern perfumer's palette.

In fragrance architecture, muguet accords function as heart notes — radiant, diffusive, and structurally transparent. They brighten chypres and fougères without adding weight, provide the central pillar in white-floral soliflores, and serve as bridges between green top notes and warm base materials. The note reads as clean and slightly aqueous, with a cool metallic edge that separates it from the heavier narcotic florals.

History

Hydroxycitronellal, the molecule that made synthetic muguet possible, was first commercialised between 1905 and 1908 by Knoll & Co. in Germany. Its first landmark use came in 1912, when perfumer Robert Bienaimé incorporated it at roughly 2.5% in Quelques Fleurs for Houbigant — the first true multi-floral bouquet in fragrance history. Through the mid-twentieth century, a family of muguet synthetics grew: Lilial arrived in the 1960s offering a cleaner, more powerful note; Lyral followed with linden-blossom qualities. Both became ubiquitous.

The early twenty-first century brought the most severe regulatory disruption in modern fragrance history. Lyral was banned in the EU in 2021 as a potent contact allergen. Lilial followed in 2022, classified as a reproductive toxin (CMR 1B). Together, these bans forced the simultaneous reformulation of hundreds of compositions. The muguet accord — once among the most stable building blocks in perfumery — had to be rebuilt from new molecules within a few years.

Did You Know?

Every part of Convallaria majalis — leaves, stems, flowers, berries — contains at least 38 identified cardiac glycosides, including convallatoxin, a compound potent enough that as few as two leaves can constitute a lethal dose for a small child or pet. The flower that perfumery celebrates for its innocence is, botanically, one of Europe's most dangerous garden plants.

Extraction & Chemistry

Extraction method

No viable natural extraction exists. Convallaria majalis is a mute flower — steam distillation, solvent extraction, and supercritical CO₂ all fail to produce a commercially usable aromatic material. The flower's volatiles (benzyl alcohol, citronellol, geraniol, farnesol, dihydrofarnesol) are biosynthesised and released in real time; they are not stored in plant tissue, which is why post-harvest extraction yields are negligible. A lily-of-the-valley absolute (CAS 68916-82-5) technically exists but is produced in quantities so small that it has no commercial relevance in perfumery. All muguet notes in fine fragrance are synthetic accords built from molecules such as hydroxycitronellal (CAS 107-75-5), Bourgeonal (CAS 18127-01-0), and Lilyflore (CAS 285977-85-7).

Formula: Synthetic accord; key molecules: hydroxycitronellal C₁₀H₂₀O₂ (MW 172.27), Bourgeonal C₁₃H₁₈O (MW 190.28), Lilyflore C₁₂H₁₆O (MW 176.26)
CAS: 68916-82-5
Botanical: Convallaria majalis
Appearance: Colorless to pale yellow liquid
Odour strength: Medium
Synonyms: MUGUET MAY LILY CONVALLARIA

IFRA status

Prohibited (some forms)

Hydroxycitronellal (CAS 107-75-5) is IFRA-restricted under Standard 043 (51st Amendment, 2023). Maximum use levels vary by product category. Lilial (CAS 80-54-6) is banned in the EU since March 2022 (CMR 1B, Regulation 2021/1902). Lyral / HICC (CAS 31906-04-4) is banned in the EU since August 2021 (Regulation 2017/1410). Lilyflore (CAS 285977-85-7) and Bourgeonal (CAS 18127-01-0) have no current IFRA restrictions.

Physical properties

Note: Convallaria majalis; natural absolute extremely rare and expensive; most lily-of-the-valley in perfumery is reconstructed synthetically

In Perfumery

Muguet is always a synthetic reconstruction — no commercially viable natural extract exists. Lilial and Lyral, formerly central to the accord, are now banned in the EU. Muguet functions as a heart note: radiant, diffusive, and structurally transparent. It is the backbone of white-floral soliflores and a brightening agent in chypres and fougères, where it lifts the composition without adding mass. The note bridges green-fresh openings and warm bases with an aqueous, soapy clarity that reads as clean rather than sweet. No PREMIEREPEAU fragrance currently features a dominant muguet accord, though traces of hydroxycitronellal appear in many modern fine fragrance formulations as a background modifier.

Role in the formula

01diffusion enhancer

02modifier

03signature note

04lifting agent

05blender

06volume builder

Available as

standard form

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