FRUITS, VEGETABLES AND NUTS / nutty · creamy · roasted
Macadamia
Category
FRUITS, VEGETABLES AND NUTS
Subcategory
nutty · creamy · roasted
Origin
Volatility
Base
Botanical
Macadamia integrifolia (smooth-shell) and M. tetraphylla (rough-shell), family Proteaceae
Appearance
Clear, light yellow oil
Odor Strength
Medium (as reconstruction)
Producing Countries
Australia (Queensland, NSW — origin and current major producer), South Africa (now world's largest producer by volume), Hawaii, Kenya, Guatemala, China.
Pyramid
Base
A roasted-nut accord — buttery, creamy, faintly caramelised — that perfumery builds from synthetic pyrazines and lactones. The cold-pressed oil itself is nearly odourless and used principally as a cosmetic carrier; the smell of macadamia is the smell of macadamia roasted.
Macadamia, as reconstructed in perfumery, opens with a soft buttery-roasted character — pyrazine-led, the Maillard signature of toasted nuts. Within the heart it develops a creamy γ-lactone body, milkier than walnut, sweeter than hazelnut. The dry-down sits in gourmand base territory, pairing easily with tonka, sandalwood and a faint vanillin warmth. On skin the accord persists as a quiet roasted-creamy memory.
Evolution over time
Immediately
Immediately
In the first minutes, macadamia reveals its rich, creamy essence.
After a few hours
After a few hours
After 1-4 hours, the nutty undertones become more prominent.
After a few days
After a few days
After 24h+, the scent remains warm and inviting.
The Full Story
Macadamia in perfumery is a reconstruction, not an extraction. The cold-pressed nut oil — the carrier oil prized by cosmetics chemists for its 16–22% palmitoleic acid content [A] — is nearly odourless. The smell that perfumers and customers recognise as 'macadamia' is the smell of macadamia roasted: Maillard products, pyrazines, furans, lactones, the soft caramel of toasted sugar.
Botany and history
Macadamia integrifolia and its rough-shelled sister M. tetraphylla belong to the Proteaceae family — an ancient Gondwanan lineage that also includes Banksia and Grevillea. Both species are endemic to subtropical eastern Australia (southern Queensland, northern New South Wales). Aboriginal peoples cultivated and traded the nuts for thousands of years under names including gyndl, jindilli and boombera [B]. Ferdinand von Mueller described the genus botanically in 1858 and named it for the chemist John Macadam. Commercial orchards began in Hawaii in the 1920s, and Australia recovered its production lead only in the 1990s. South Africa is now the world's largest producer by volume.
The reconstruction
A perfumery macadamia accord is built from synthetic blocks. Pyrazines (2,5-dimethylpyrazine, 2-ethyl-3,5-dimethylpyrazine) carry the roasted-nutty signature [C] — the same compounds that flavour roasted coffee, peanuts and cocoa nibs. γ-Decalactone (CAS 706-14-9) and γ-undecalactone supply the creamy fatty body. Ethyl maltol (CAS 4940-11-8) softens the whole into sugar-warmth. Sandalwood and tonka bean often sit underneath, supplying milky-resinous depth. The accord is gourmand-woody, base-weighted, and lives easily next to vanilla, hazelnut, coffee, fig and almond.
Sources & Notes
[A] Macadamia oil fatty acid composition — ~58–63% oleic, 16–22% palmitoleic. See: Hu et al., 'Composition of Macadamia Nut Oil,' Journal of the American Oil Chemists' Society, and routine cosmetic ingredient specifications. PubChem CID 445639 (oleic acid, CAS 112-80-1); CID 445638 (palmitoleic acid, CAS 373-49-9).
[B] Aboriginal use of macadamia: Maiden, J.H., The Useful Native Plants of Australia (1889); contemporary ethnobotanical sources at the Australian National Botanic Gardens.
Aboriginal peoples in southern Queensland and northern New South Wales cultivated and traded macadamia — known as gyndl, jindilli, kindal kindal, or boombera depending on the language — for thousands of years before European arrival. The tree was botanically described in 1858 by Ferdinand von Mueller, who named it for the chemist John Macadam. Commercial cultivation began in Hawaii in the 1920s; Australia recovered its lead only in the 1990s.
Extraction & Chemistry
Extraction method: Cold pressing of macadamia kernels yields the cosmetic carrier oil (used in skin and hair preparations for its high palmitoleic acid content). There is no commercial aromatic extraction — no absolute, no essential oil — because the volatile aromatic profile of macadamia is generated by roasting, not by the raw nut, and Maillard-derived aromatics are unstable and short-lived. Perfumery 'macadamia' is therefore always synthetic reconstruction.
Molecular Formula
Not a single compound. The cold-pressed cosmetic oil is a triglyceride mixture (~58–63% oleic acid C₁₈H₃₄O₂, 16–22% palmitoleic acid C₁₆H₃₀O₂, ~9% palmitic acid C₁₆H₃₂O₂). The roasted-macadamia aroma is a Maillard product mixture — pyrazines and furans, not a single molecule.
CAS Number
Macadamia nut oil (cold-pressed fixed oil): CAS 129811-19-4 (cosmetic carrier oil, largely odourless). The roasted-macadamia aromatic profile has no single CAS — it is a reconstructed accord built from pyrazines (2,5-dimethylpyrazine CAS 123-32-0, 2-ethyl-3,5-dimethylpyrazine CAS 13360-65-1), furans, lactones, and ethyl maltol.
Botanical Name
Macadamia integrifolia (smooth-shell) and M. tetraphylla (rough-shell), family Proteaceae
IFRA Status
The cosmetic oil is not IFRA-restricted (it is a fixed oil, not a fragrance ingredient). The reconstruction's component synthetics each carry their own profiles: ethyl maltol unrestricted at perfumery levels; pyrazines safe at typical use; gamma-lactones may carry category limits in IFRA 51st Amendment depending on chain length.
Macadamia is a Fantasy/Concept accord in fragrance — there is no commercial macadamia essential oil. The aromatic role is reconstruction: pyrazines (the Maillard signature of any roasted nut), gamma-lactones for cream, ethyl maltol for sugar-warmth, sandalwood and tonka bean for depth. It supports gourmand-woody compositions, especially milk-and-nut accords, and pairs naturally with vanilla, sandalwood, coffee, hazelnut and tonka. Macadamia is not a note in any current Première Peau composition.
