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Lilac

FLOWERS  /  floral · powdery · sweet
Lilac
Lilac perfume ingredient
CategoryFLOWERS
Subcategoryfloral · powdery · sweet
Origin
VolatilityHeart Note
BotanicalSyringa vulgaris
Appearancegreen to dark green viscous liquid
Odor StrengthMedium
Producing CountriesEurope, North America
PyramidHeart

Powdery, sweet, slightly rosy — the scent of wet purple petals crushed between fingers on a cold spring morning. Lilac smells like memory before you can name it.

  1. Scent
  2. Terroir & Origins
  3. The Full Story
  4. Fun Fact
  5. Extraction & Chemistry
  6. In Perfumery

Scent

Sweet, powdery, and cool — closer to violet than to rose, but less earthy than either. A green-waxy freshness sits underneath, like the smell of a just-snapped stem. The overall impression is clean, soapy, and slightly narcotic — similar to of face powder left in a cold bathroom. Drier and more transparent than hyacinth, less dense than tuberose, with none of jasmine's animalic edge.

Evolution over time

Immediately

Immediately

Sharp green-floral burst, slightly aldehydic and wet, like crushed purple petals with morning dew
After a few hours

After a few hours

Powdery, sweet, violet-adjacent softness with a waxy, almost soapy transparency
After a few days

After a few days

Faint vanillic-almond trace, tissue-paper dryness, barely perceptible on skin

Terroir & Origins

Indicative 2025 wholesale prices.

The Full Story

Lilac (Syringa vulgaris, Oleaceae — the olive family, same as jasmine) is one of the famous 'silent flowers' of perfumery: like wisteria, lily-of-the-valley, peony and sweet pea, it yields very little to traditional extraction. Solvent extraction at academic scale has been done — and CAS 68916-92-7 refers to such extracts — but no large-volume commercial lilac absolute exists in trade.

Reconstruction

The 'lilac' note in modern perfumery is therefore always a reconstruction. The classic building blocks are terpineol (α-terpineol, CAS 98-55-5) [A] for the floral-pine lift, indole at trace levels for animalic depth, anisaldehyde for the powdery-sweet edge, and hydroxycitronellal for the muguet-floral body. Heliotropin sometimes appears for cherry-pit warmth. The recognisable 'lilac' character lives in the balance between these — none alone smells of lilac; together they evoke it.

Sources & Notes

[A] PubChem CID 17100 — α-terpineol, CAS 98-55-5, C₁₀H₁₈O. The floral-pine alcohol central to lilac and many other reconstructed floral accords. pubchem.ncbi.nlm.nih.gov/compound/17100.

Did You Know?

Did you know?
Lilac is one of perfumery's 'mute flowers' — botanically fragrant but chemically impossible to extract. Every lilac note ever smelled in a perfume was built molecule by molecule from scratch, never from the actual flower.

Extraction & Chemistry

Extraction method: No viable natural extraction exists. Lilac is one of perfumery's classic 'mute flowers' — neither steam distillation, solvent extraction, nor CO2 extraction produces a commercially usable material. All lilac notes in contemporary use are synthetic accords built from hydroxycitronellal, terpineol, anisic aldehyde, heliotrop in, linalool, and various supporting molecules.

↑ See Terroir & Origins for origin-specific methods.

Molecular FormulaComplex natural mixture (lilac aldehyde: C₁₀H₁₆O₂)
CAS Number68916-92-7
Botanical NameSyringa vulgaris
IFRA StatusNo known restrictions
Synonymscommon lilac
Physical Properties
Odor StrengthMedium
Appearancegreen to dark green viscous liquid
Specific Gravity0.94900 to 0.96100 @ 25.00 °C.
Refractive Index1.47900 to 1.48300 @ 20.00 °C.

In Perfumery

Lilac is always synthetic in perfumery — the flower yields no viable essential oil or absolute. The reconstruction is built from terpineol, indole at trace levels, anisaldehyde and hydroxycitronellal. Lilac sits as a heart-note signature, supplying powdery-rosy-floral lift to spring-fresh compositions, and pairing naturally with violet, muguet, jasmine and honey notes.

From the raw to the worn

This is what it becomes.