Bourgeonal (CAS 18127-01-0) — Floral Heart Note Fragrance Ingredient
Bourgeonal
CAS 18127-01-0
What Is Bourgeonal?
Bourgeonal is a synthetic fragrance ingredient prized for its fresh, floral lily-of-the-valley scent. It’s commonly found in perfumes, soaps, and detergents. This aldehyde is valued for its ability to impart crisp floralcy without heaviness, making it versatile in modern perfumery.
Safety Profile
GENERALLY SAFE
What Does Bourgeonal Smell Like?
Bourgeonal opens with a burst of dewy green freshness reminiscent of crushed lily petals. The heart evolves into a crisp, airy floralcy with subtle aquatic undertones. Dry-down reveals a clean, slightly powdery sweetness that lingers close to the skin. Like sunlight filtering through a spring garden after rain.
Scent Profile
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Bourgeonal provides the sparkling floral top notes that define this fresh feminine classic, blending with peony and lily for a dewy effect.
Used alongside lotus and freesia to create the signature aquatic floralcy that revolutionized 90s perfumery.
2D Molecular Structure
SMILES: CC(C)(C)C1=CC=C(CCC=O)C=C1
Chemistry, Properties & Perfumer Guide
The Chemistry
Bourgeonal (3-(4-tert-butylphenyl)-2-methylpropanal) is an aromatic aldehyde. Commercially synthesized via hydroformylation of 4-tert-butylstyrene. The tert-butyl group prevents oxidation, enhancing stability. Key chiral center influences odor profile – (R)-enantiomer exhibits stronger floral character.
Physical & Chemical Properties
| Boiling Point | Not available |
|---|---|
| Density | Not available |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-3% | Up to 5% | Provides fresh floral lift |
| Functional Products | 0.1-1% | Up to 2% | Adds clean floral character |
Classic Accords
+ Calone + Marine notes = Aquatic floral
Tip: Stabilize with antioxidants to prevent aldehyde oxidation.
Alternatives & Comparisons
Formerly used alternative with similar profile but restricted due to sensitization concerns.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. IFRA, REACH, EU Cosmetics Regulation standards update periodically. Consult current IFRA Standards Library before formulating. Not legal or regulatory advice.
IFRA Status
No current IFRA restrictions. Monitor for potential future regulation of aromatic aldehydes.
EU Allergen Declaration
Not currently listed as EU allergen.
RIFM Assessment
RIFM safety assessment ongoing for this material class.
Sustainability
Synthetic production avoids natural resource depletion. Manufacturing requires petrochemical feedstocks – emerging green chemistry approaches may improve sustainability.
Explore Bourgeonal
Browse essential oils and aroma compounds.
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Industry & Science Data
References
- Bickers et al. (2005). Safety assessment of aromatic aldehydes. Food and Chemical Toxicology. PMID 15970412
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Mar 2026.
Physicochemical Properties
DTXSID: DTXSID6044808
Physical Properties
| Molecular Weight | 190.286 g/mol🔬 EPA CompTox |
| Density | 0.959 g/cm^3🔬 EPA CTX |
| Boiling Point | 206.85 °C🔬 EPA CTX |
| Melting Point | -10.7 °C🔬 EPA CTX |
| Flash Point | 73.5 °C🔬 EPA CTX |
| Refractive Index | 1.494 Dimensionless📊 OPERA |
| Molar Volume | 202.764 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 3.2 Log10 unitless🔬 EPA CTX |
| LogD (pH 5.5) | 3.972 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 3.972 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 6.56 Log10 unitless📊 OPERA |
| Water Solubility | 0.001 mol/L🔬 EPA CTX |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.002 mmHg🔬 EPA CTX |
| Viscosity | 3.079 cP📊 OPERA |
| Surface Tension | 31.161 dyn/cm📊 OPERA |
| Thermal Conductivity | 125.978 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 17.07 Ų💻 Computed |
| H-Bond Donors | 0 count💻 Computed |
| H-Bond Acceptors | 1 count💻 Computed |
| Rotatable Bonds | 3 count💻 Computed |
| Aromatic Rings | 1 count💻 Computed |
| Molar Refractivity | 59.009 cm^3/mol📊 OPERA |
| Polarizability | 23.393 Å^3📊 OPERA |
Data Sources:
🔬 EPA Experimental data from U.S. EPA CompTox Chemicals Dashboard & CTX APIs. 📊 OPERA Predicted using EPA's OPERA QSAR models. 💻 Computed Calculated from SMILES using RDKit.
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