Macadamia seed oil, fixed (CAS 129811-19-4) — Sweet Base Note Fragrance Ingredient
Macadamia seed oil, fixed
CAS 129811-19-4
What Is Macadamia seed oil, fixed?
Macadamia seed oil is a luxurious plant-derived oil extracted from the nuts of the macadamia tree, native to Australia. It’s commonly found in skincare products, hair treatments, and occasionally in niche fragrances for its rich, nutty character. This oil matters because it provides exceptional moisturizing properties while adding a subtle gourmand warmth to fragrance compositions, making it valuable in both cosmetic and perfumery applications.
Safety Profile
GENERALLY SAFEWhat Does Macadamia seed oil, fixed Smell Like?
Macadamia seed oil offers a rich, buttery aroma with deep nutty undertones reminiscent of freshly cracked hazelnuts and sweet cream. Its scent evolves subtly on the skin, starting with a smooth, slightly green top note that quickly settles into a warm, toasted nut heart. The dry-down reveals a comforting, almost vanillic base that lingers close to the skin. Unlike sharper nut oils, macadamia maintains a rounded, creamy character throughout its lifespan, making it ideal for adding gourmand depth without overpowering other notes.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used for its creamy nuttiness that complements the vanilla heart, adding a gourmand richness that prevents the composition from becoming overly sweet.
Provides a smooth, nutty bridge between the citrus top notes and warm tonka bean base, enhancing the fragrance’s edible appeal.
Chemistry, Properties & Perfumer Guide
The Chemistry
Macadamia seed oil is primarily composed of triglycerides with a high percentage of monounsaturated fatty acids, particularly palmitoleic acid (C16:1) and oleic acid (C18:1). Its unique composition gives it exceptional oxidative stability compared to other nut oils. The oil is cold-pressed from the kernels of Macadamia integrifolia and M. tetraphylla, with the fixed oil containing minor volatile components that contribute to its characteristic aroma. Unlike essential oils, it doesn’t undergo distillation, preserving its full fatty acid profile and natural antioxidants like tocopherols.
Physical & Chemical Properties
| Appearance | Pale yellow viscous liquid |
|---|---|
| Solubility | Insoluble in water, soluble in organic solvents |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Used as a fixative and gourmand modifier |
| Skincare | 1-10% | Up to 100% | Valued for emollient properties |
Classic Accords
Tip: Use as a natural fixative in gourmand compositions where a subtle nutty creaminess is desired.
Alternatives & Comparisons
Offers a sharper, more distinct nutty character when a more pronounced gourmand effect is needed.
Provides similar emollient properties without the nutty aroma for neutral base applications.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions apply to macadamia seed oil.
RIFM Assessment
Considered safe for use in cosmetics and fragrances by RIFM with no significant concerns.
Sustainability
Macadamia oil production is generally sustainable, with most trees grown in well-managed orchards. The nuts are hand-harvested, supporting local economies in Australia and Hawaii. As a fixed oil, it requires no energy-intensive distillation processes. However, the increasing global demand has led to some expansion of plantations, necessizing responsible sourcing practices to prevent deforestation.
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References
- Wall, M.M. (2010). Functional Lipid Characteristics, Oxidative Stability, and Antioxidant Activity of Macadamia Nut Cultivars. Journal of Agricultural and Food Chemistry. DOI:10.1021/jf9028404
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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