Propyl hexanoate (CAS 626-77-7) — Sweet Top Note Fragrance Ingredient
Propyl hexanoate
CAS 626-77-7
What Is Propyl hexanoate?
Propyl hexanoate is a synthetic ester used in perfumery for its fruity, pineapple-like aroma. You’ll encounter it in tropical fragrances and some fruity-floral body care products. This ingredient matters because it provides an authentic, juicy tropical fruit note that’s more stable than natural extracts, allowing fragrances to maintain their character over time.
Safety Profile
GENERALLY SAFEWhat Does Propyl hexanoate Smell Like?
Propyl hexanoate bursts with a bright, tropical fruitiness – imagine biting into a perfectly ripe pineapple with hints of strawberry and pear. The top note is intensely juicy, settling into a softer, slightly waxy green apple character over time. Unlike heavier fruit esters, it maintains a fresh, almost effervescent quality throughout dry-down, making it ideal for modern fruity-floral compositions.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used to create the cocktail-like pineapple top note that makes this tropical fragrance so refreshing and realistic.
Provides the candied pineapple core that defines this modern fruity fougère.
Chemistry, Properties & Perfumer Guide
The Chemistry
Propyl hexanoate belongs to the ester class, formed through Fischer esterification of propanol and hexanoic acid. These short-chain esters are prized in perfumery for their volatile, diffusive fruity characteristics. The molecular structure allows for excellent stability while maintaining a low odor threshold, making it efficient in formulations.
Physical & Chemical Properties
| Boiling Point | 168-170 °C |
|---|---|
| Density | 0.865 g/cm³ |
| Refractive Index | 1.406-1.409 |
| Flash Point | 58 °C |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-3% | Up to 5% | For tropical fruit accents |
| Body Care | 0.5-2% | Up to 3% | In fruity shower gels & lotions |
| Candles | 2-4% | Up to 6% | For realistic fruit notes |
Classic Accords
Tip: Use in trace amounts with citrus oils to enhance natural fruitiness without becoming candied.
Alternatives & Comparisons
More intense pineapple note, but evaporates faster. Better for short-lived products like body sprays.
Stronger, more pungent pineapple character. Used when more projection is needed.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No restrictions under current IFRA standards.
RIFM Assessment
RIFM safety assessment confirms safe use at current industry levels.
Sustainability
As a petrochemical-derived material, propyl hexanoate has a higher carbon footprint than natural extracts, but requires far less land and water resources. Its synthetic nature ensures consistent quality without agricultural variability.
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References
- PubChem Compound Summary for Propyl hexanoate CID 7897
- Bauer et al. (2001). Common Fragrance and Flavor Materials.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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