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Osmanthus

Mộc tê, Quế hoa

Osmanthus fragrans

Fragrant olive, Sweet olive, Tea olive, Olea fragrans

Oleaceae · Hoa · Flowers · Solvent-extracted (absolute)


Osmanthus essential oil (Osmanthus fragrans) — botanical illustration
Osmanthus fragrans

Safety

GRAS · No restrictions

Osmanthus absolute is classified as GRAS by the US FDA. No specific IFRA restriction.

Very low skin sensitization risk. β-Ionone and other ionones tend to be non-reactive on skin.

Ionones have no significant acute toxicity.

No data indicates hazard in pregnancy. Some in vitro studies show β-ionone has anticarcinogenic activity.

In niche perfumery, osmanthus is among the most expensive and most prized absolutes.


Usage guidelines

GRAS status
Yes (US FDA)
IFRA limit
No concentration limit
Suitable for
Fine fragrance, niche perfumery, premium body lotion
Aroma profile
Floral, ripe apricot, leather, honey-sweet, light leather, ionone-rich
Storage
Dark, sealed, refrigerated

Chemistry

Volatile constituents
β-Ionone7.6 – 33.8 %
Dihydro-β-ionone6.4 – 15.7 %
γ-Decalactone4.7 – 12.7 %
Linalool0.8 – 8.7 %
Geraniol1.2 – 7.1 %
(E)-Linalool oxide0.6 – 7.0 %
(Z)-Linalool oxide0.7 – 5.6 %
Decan-4-olide0 – 4.0 %
Dihydro-β-ionol0 – 3.0 %
α-Iononetr – 2.3 %
2-Phenylethanoltr – 2.2 %

Botanical source

Osmanthus fragrans is a small flowering tree native to East Asia, China, Japan, Korea. Small yellow-orange flowers grow in clusters. The aroma is so intense it can be sensed from a distance.

In Chinese culture, osmanthus (桂花 guihua) is a symbol of autumn and good fortune. The flowers are used in tea (osmanthus tea), wine (osmanthus wine), preserves, and pastries.

In Japan, osmanthus (キンモクセイ kinmokusei) is a popular autumn flower with a distinctive aroma. In Korea, called mokseo (목서).

The absolute is solvent-extracted from fresh flowers. Approximately 2,500 kg of flowers are needed to yield 1 kg of absolute. Also called 'osmanthus concrete' for the raw form before alcohol washing.

Main production: China (Guilin, Guizhou). Small-scale, among the rarest and most expensive absolutes.

Family Oleaceae, same family as olive (Olea europaea), jasmine (Jasminum), and lilac (Syringa).


Quality

Osmanthus absolute is expensive and often adulterated at the lower market end. Synthetic reconstructions rely mainly on synthetic β-ionone plus γ-decalactone.

Verify quality by chiral GC-MS analysis. The enantiomer ratio of β-ionone and linalool oxide is an important indicator.

True osmanthus aroma: floral-apricot-leather, with lactonic depth from γ-decalactone, not perfectly replicable by synthesis.

Chinese Guilin osmanthus is regarded as the gold standard. Some Japanese extractors also produce high-quality absolute.


Notes

In modern perfumery, osmanthus is among the most admired East Asian absolutes in the Western fragrance tradition. Major fragrance houses like Hermès, Chanel, and Diptyque all have at least one fragrance built around osmanthus.

Osmanthus has a distinctive aromatic structure: top of fresh flowers, middle of ripe apricot and leather, base of warm and creamy notes. A naturally multi-layered structure, one of the most 'complex' absolutes in perfumery.

β-Ionone in natural osmanthus has a particular structure, combined with γ-decalactone, it creates the signature 'apricot-leather' note inseparable from true osmanthus.

In cosmetics, osmanthus is a premium ingredient for fine fragrance, body lotion, and premium hand cream. Suited to East-Asian inspired or East-West fusion products.

For Lê Mai, a Vietnamese brand with Vietnamese + Japanese sensibility, osmanthus is among the most suitable absolutes for conveying East Asian spirit in perfumery.