Alcohols, sesquiterpenoidal, citronella-oil (CAS 73049-35-1) — Green Middle Note Fragrance Ingredient
Alcohols, sesquiterpenoidal, citronella-oil
CAS 73049-35-1
What Is Alcohols, sesquiterpenoidal, citronella-oil?
Alcohols, sesquiterpenoidal, citronella-oil are natural components found in citronella essential oil, commonly encountered in insect repellents and outdoor candles. These compounds contribute to citronella’s distinctive grassy, citrusy aroma. They matter because they enhance the oil’s effectiveness as a natural bug deterrent while adding complexity to its scent profile.
Safety Profile
GENERALLY SAFEWhat Does Alcohols, sesquiterpenoidal, citronella-oil Smell Like?
The sesquiterpenoid alcohols in citronella oil present a complex aromatic profile – opening with bright, lemony top notes reminiscent of freshly crushed lemon grass. As the scent evolves, it reveals a heart of green, herbaceous tones with subtle earthy undertones. The dry-down shows a warm, woody character with faint floral whispers, creating a surprisingly sophisticated trail from this often utilitarian oil.
Chemistry, Properties & Perfumer Guide
The Chemistry
Sesquiterpenoid alcohols in citronella oil belong to the terpenoid class of compounds, characterized by their 15-carbon skeleton structure. These oxygenated derivatives of sesquiterpenes occur naturally in Cymbopogon species. The exact composition varies by plant origin, but typically includes elemol, citronellol, and other related structures. Their synthesis in plants occurs via the mevalonate pathway, with subsequent enzymatic modifications creating the diverse alcohol variants found in the essential oil.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Functional Fragrances | 5-12% | Up to 20% | Adds natural complexity to repellent formulations |
| Household Products | 2-8% | Up to 15% | Provides fresh, clean character |
| Fine Fragrance | 0.5-3% | Up to 5% | Used as green modifier |
Classic Accords
Tip: Blend with citrus top notes to enhance freshness and extend longevity of the citrus character.
Alternatives & Comparisons
A simpler monoterpenoid alcohol with similar citrus-rosy character but less green depth.
Another sesquiterpene alcohol with woodier, spicy nuances that can complement citronella notes.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA.
RIFM Assessment
RIFM has evaluated similar sesquiterpenoid alcohols and found them safe at current usage levels.
Sustainability
Citronella oil is sustainably harvested from fast-growing grasses, primarily in tropical regions. The sesquiterpenoid alcohol fraction represents a natural byproduct of essential oil production. While synthetic versions exist, the natural extraction supports agricultural communities and maintains biodiversity in cultivation areas.
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