Lemon oil terpenes (CAS 68917-33-9) — Citrus Top Note Fragrance Ingredient
Lemon oil terpenes
CAS 68917-33-9
What Is Lemon oil terpenes?
Lemon oil terpenes are the bright, zesty components extracted from lemon peels that give citrus fragrances their characteristic freshness. You encounter them in household cleaners, citrus colognes, and summer body sprays. These molecules matter because they create instant freshness while being biodegradable, making them preferred over synthetic alternatives for natural formulations.
Safety Profile
GENERALLY SAFEWhat Does Lemon oil terpenes Smell Like?
A burst of sun-warmed lemon groves – tart, slightly bitter citrus peel with a green twig snap. Opens with electric limonene sharpness that mellows into terpinene’s herbal complexity. The dry-down reveals faintly waxy aldehydic tones like candied lemon rind. Unlike synthetic citrus, retains natural roughness with subtle peppery nuances from trace sesquiterpenes.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Uses lemon terpenes for their natural volatility, creating the iconic citrus-herbal opening that defines the cologne genre. The rough edges prevent excessive sweetness.
Terpenes provide authentic Mediterranean lemon character, blending with lavender for a barbershop freshness that synthetic citrals can’t replicate.
Chemistry, Properties & Perfumer Guide
The Chemistry
Primarily composed of limonene (60-70%), γ-terpinene (10-15%), and β-pinene (5-10%) with minor sesquiterpenes. Obtained through cold-pressing lemon peels followed by fractional distillation. The terpene profile varies by cultivar – Sicilian lemons contain more citral precursors. Unlike single molecules, this mixture captures the full spectrum of citrus top notes with natural cofactors that modify evaporation behavior.
Physical & Chemical Properties
| Flash Point | 46 °C |
|---|---|
| Refractive Index | 1.471-1.475 |
Key Constituent Properties
| Constituent | CAS | MW | BP °C | XLogP | Vapor P. |
|---|---|---|---|---|---|
| Limonene | 138-86-3 | 136.24 | 176 °C | 4.38 | 1.5 mmHg |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 2-5% | Up to 10% | Provides natural citrus lift in colognes |
Classic Accords
Tip: Stabilize with antioxidants like BHT to prevent terpene polymerization in bases.
Alternatives & Comparisons
When sharper lemon definition is needed without natural variability.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No restrictions under IFRA 51st Amendment. Limonene content requires allergen labeling.
EU Allergen Declaration
Must be declared if limonene > 0.001% in leave-on products
GHS Classification
RIFM Assessment
Considered safe at current use levels by RIFM (2016).
Sustainability
Sustainably sourced from citrus juice industry byproducts. Cold-pressing has lower carbon footprint than steam distillation. Some producers use CO2 extraction for higher terpene yields.
Explore Lemon oil terpenes
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References
- Dugo et al. (2011). Citrus Oils: Composition and Applications. Flavour and Fragrance Journal. DOI:10.1002/ffj.2050
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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