Eucalyptus citriodora oil, acetylated (CAS 68991-29-7) — Citrus Top to middle Note Fragrance Ingredient
Eucalyptus citriodora oil, acetylated
CAS 68991-29-7
What Is Eucalyptus citriodora oil, acetylated?
Acetylated eucalyptus citriodora oil is a modified fragrance ingredient derived from lemon eucalyptus. Consumers encounter it in fresh, citrusy cleaning products and some perfumes. This ingredient matters because it combines eucalyptus’ crispness with enhanced citrus notes, creating longer-lasting freshness than natural eucalyptus oils alone.
Safety Profile
GENERALLY SAFEWhat Does Eucalyptus citriodora oil, acetylated Smell Like?
Acetylated eucalyptus citriodora oil opens with a burst of lemony freshness, sharper and more candied than natural eucalyptus. The heart reveals a crisp medicinal quality reminiscent of cough drops, softened by rounder citrus esters. Dry-down shows woody undertones with lingering lemon peel brightness. Unlike fleeting citronella notes, this acetylated version maintains its character for hours, evolving from a tart top note to a clean, almost soapy base.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used for its energizing citrus-eucalyptus accord that lasts through the fragrance’s evolution, providing a crisp contrast to the floral heart notes.
The acetylated oil enhances the mint-tea concept with sustained lemon freshness that bridges the green top notes to vanilla base.
Chemistry, Properties & Perfumer Guide
The Chemistry
This material is produced by acetylating the natural terpenes in Eucalyptus citriodora oil, primarily converting citronellal to citronellyl acetate. The process increases ester content for improved stability and longevity. While not found in nature, the modified profile retains key characteristics of the parent oil with reduced volatility. The acetylation typically yields a mixture of citronellyl acetate, geranyl acetate, and related esters.
Physical & Chemical Properties
| Appearance | Pale yellow liquid |
|---|---|
| Solubility | Soluble in alcohol and oils |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Household Cleaners | 0.5-2% | Up to 5% | Provides lasting freshness |
| Fine Fragrance | 1-3% | Up to 8% | Used in citrus fougères |
Classic Accords
Tip: Blend with ionones to soften the sharp citrus edge while maintaining diffusion.
Alternatives & Comparisons
For simpler citrus-rosy effects without eucalyptus character. Works better in floral compositions.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No restrictions under IFRA 51st Amendment. Considered safe at current usage levels.
RIFM Assessment
RIFM assessment confirms safety for current cosmetic applications at reported use levels.
Sustainability
While derived from a renewable resource, the acetylation process requires chemical modification. Some producers offset this with sustainable eucalyptus farming practices. The synthetic route avoids overharvesting of natural eucalyptus stands.
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References
- Bauer, K. et al. (2001). Common Fragrance and Flavor Materials. Wiley-VCH.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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