1-Cyclohexylethyl butyrate (CAS 63449-88-7) — Sweet Top to middle Note Fragrance Ingredient
1-Cyclohexylethyl butyrate
CAS 63449-88-7
What Is 1-Cyclohexylethyl butyrate?
1-Cyclohexylethyl butyrate is a synthetic fragrance ingredient used to add fruity, tropical nuances to perfumes and scented products. You’ll encounter it in tropical-themed body sprays, fruity shampoos, and some modern floral fragrances. This ester matters because it provides a cost-effective way to create juicy, exotic fruit notes without relying on natural extracts. Its stability makes it valuable for long-lasting formulations where fresh top notes are desired.
Safety Profile
GENERALLY SAFEWhat Does 1-Cyclohexylethyl butyrate Smell Like?
1-Cyclohexylethyl butyrate bursts with a vibrant tropical fruit basket aroma – imagine ripe pineapple chunks mingling with overripe banana and a splash of coconut water. The top note is intensely juicy, with a slight green apple crispness that prevents cloying sweetness. As it evolves, the heart reveals creamy undertones reminiscent of mango flesh and passionfruit seeds. The dry-down is surprisingly clean, leaving a faint musky-fruity trail that blends seamlessly with woody base notes. Unlike simpler fruit esters, this molecule maintains dimensional complexity throughout its evaporation curve.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used here to amplify the coconut-lime cocktail illusion, contributing a sun-warmed tropical fruit basket effect that complements the rum accord.
Provides a juicy counterpoint to the bitter orange blossom, creating a ‘fruit peel’ dimensionality in this citrus-floral composition.
Chemistry, Properties & Perfumer Guide
The Chemistry
1-Cyclohexylethyl butyrate belongs to the ester class, formed through esterification of butyric acid with 1-cyclohexylethanol. The cyclohexyl ring provides stability against hydrolysis while the butyrate moiety delivers characteristic fruity notes. Industrial synthesis typically employs acid-catalyzed Fischer esterification under controlled conditions. The chiral center at the ethanol carbon may produce different olfactory profiles for enantiomers, though most commercial material is racemic. This synthetic route offers advantages over natural extraction in consistency and yield.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Boiling Point | Estimated 230-250°C |
| Density | Approx. 0.92-0.95 g/cm³ |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Tropical fruit accent |
| Body Care | 0.2-1% | Up to 3% | Shampoos/shower gels |
Classic Accords
Tip: Use with citrus top notes to prevent excessive sweetness in tropical compositions.
Alternatives & Comparisons
Simpler fruity ester for when less complexity is needed. More volatile with stronger pineapple character.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA standards.
RIFM Assessment
Not yet evaluated by RIFM. Recommended for standard testing protocols.
Sustainability
As a fully synthetic material, production avoids agricultural land use. The petrochemical feedstock raises carbon footprint concerns, but efficient synthesis minimizes waste. Future green chemistry approaches may enable bio-based routes from sustainable sources.
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References
- Burdock, G.A. (2010). Fenaroli’s Handbook of Flavor Ingredients. CRC Press. ISBN 9781439817373
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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