Citronella oil, reduced (CAS 68916-56-3) — Citrus Top to Middle Note Fragrance Ingredient
Citronella oil, reduced
CAS 68916-56-3
What Is Citronella oil, reduced?
Reduced citronella oil is a processed version of the familiar insect-repellent oil, where certain harsh top notes have been removed. You’ll find it in outdoor candles, natural bug sprays, and some fresh citrusy perfumes. This refined version matters because it keeps citronella’s bright, lemony character while being gentler on skin and more versatile in fragrance blends than the raw oil.
Safety Profile
USE WITH AWARENESSWhat Does Citronella oil, reduced Smell Like?
Stripped of its most aggressive medicinal edges, reduced citronella oil unfolds like a sun-warmed lemon grove with dewy green stems. The opening is all brightness – think freshly zested bergamot with a hint of pink grapefruit pith. As it settles, a soft rosy geranium heart emerges, grounded by just enough earthy vetiver-like depth to prevent it from being shrill. Unlike raw citronella, there’s no harsh camphoraceous bite, making it wearable in compositions where you want citrus persistence without the cleaning-product connotations.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Uses reduced citronella oil as the luminous core of its ‘sun-baked citrus’ accord, blending it with shiso and mate tea to create a modern, long-lasting citrus that avoids traditional cologne tropes.
Employed subtly in the top notes to amplify the citrusy aspects of magnolia flower, adding tenacity to what would otherwise be a fleeting citrus opening.
Chemistry, Properties & Perfumer Guide
The Chemistry
Reduced citronella oil is produced through molecular distillation of Cymbopogon winterianus oil, selectively removing aldehydes like citronellal while preserving desirable monoterpenes. The process increases the relative concentration of citronellol and geraniol (typically 35-45% combined), creating a rosier, more perfume-friendly profile. Modern variants may also undergo hydrogenation to convert remaining citral into less reactive dihydrocitronellol, improving stability in alkaline formulations.
Physical & Chemical Properties
| Appearance | Pale yellow liquid |
|---|---|
| Solubility | Soluble in alcohol, insoluble in water |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Adds citrus persistence |
| Functional Fragrance | 3-8% | Up to 15% | Bug repellent products |
| Home Care | 1-3% | Up to 10% | Fresh cleaning products |
Classic Accords
Tip: Use to extend citrus top notes in natural perfumes where synthetic musks aren’t desired.
Alternatives & Comparisons
For a more purely rosy effect without the green citrus aspects, ideal when blending with rose absolutes.
When higher citral content is desired for punchier citrus openings in natural formulations.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not restricted under current IFRA standards (as of 50th Amendment).
EU Allergen Declaration
Contains citronellol and geraniol – must be declared above 0.001% in leave-on products.
RIFM Assessment
Considered safe at current usage levels by RIFM, with complete toxicological profile available.
Sustainability
Most commercial reduced citronella is now produced through green chemistry distillation methods that recover solvents. The shift from Java-type to Ceylon-type citronella grass cultivation has reduced water usage by 40% in major producing regions. Some producers offer Fair Trade certified options supporting Indonesian smallholders.
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References
- ISO 3849:2017 – Oil of citronella (Cymbopogon winterianus Jowitt) ISO Standard
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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