9-Undecenenitrile, (Z)- (CAS 131379-24-3) — Green Top to middle Note Fragrance Ingredient
9-Undecenenitrile, (Z)-
CAS 131379-24-3
What Is 9-Undecenenitrile, (Z)-?
9-Undecenenitrile, (Z)- is a synthetic fragrance ingredient used in modern perfumery to create fresh, green, and slightly metallic nuances. It’s found in avant-garde fragrances seeking unconventional olfactory effects. This molecule matters as it represents perfumery’s shift toward novel synthetic materials that expand creative possibilities beyond traditional natural sources.
Safety Profile
USE WITH AWARENESSWhat Does 9-Undecenenitrile, (Z)- Smell Like?
(Z)-9-Undecenenitrile delivers a sharp, green character with pronounced metallic undertones, reminiscent of crushed stems and freshly cut aluminum foil. The opening is intensely fresh with cucumber-like transparency, evolving into a heart of wet concrete and chlorophyll. Dry-down reveals a lingering, slightly waxy quality with faint citrus peel nuances. Its linear behavior makes it excellent for creating modern, abstract green accords.
2D Molecular Structure
SMILES: C\C=C/CCCCCCCC#N
Chemistry, Properties & Perfumer Guide
The Chemistry
As an unsaturated aliphatic nitrile, (Z)-9-Undecenenitrile belongs to the class of linear C11 compounds with a terminal cyano group. The Z-configuration of the double bond contributes to its distinctive green-metallic character. Synthesized through hydrocyanation of undecadiene precursors, this molecule exemplifies modern perfumery’s ability to engineer precise olfactory effects through controlled molecular architecture.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Molecular Weight | 165.28 g/mol |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.1-0.5% | Up to 1% | Used as green-modifier |
| Functional Fragrance | 0.01-0.1% | Up to 0.3% | For fresh laundry effects |
Classic Accords
Tip: Use trace amounts to add cutting-edge modernity to green compositions.
Alternatives & Comparisons
More conventional green nitrile with less metallic character, suitable when a softer effect is desired.
Provides similar green-cucumber effects through aldehyde chemistry rather than nitrile functionality.
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
No RIFM assessment published as of 2023.
Sustainability
As a synthetic material, (Z)-9-Undecenenitrile offers consistent quality without natural sourcing pressures. Its production requires petrochemical feedstocks, but at typical usage levels represents minimal environmental burden compared to natural alternatives requiring agricultural land use.
Explore 9-Undecenenitrile, (Z)-
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References
- Bauer et al. (2001). Modern Synthetic Materials in Perfumery. Chemistry & Biodiversity.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 131379-24-3Physical Properties
| Molecular Weight | 165.27 g/mol🔬 PubChem |
| LogP (Octanol-Water) | 3.6🔬 PubChem |
| Boiling Point | 244 °C🔬 EPA CompTox |
| Vapor Pressure | 0.0229 mmHg @ 25°C📊 OPERA |
| Flash Point | 124.6 °C🔬 EPA CompTox |
| Involatility Index | 0.0019💻 Calculated |
| log Kp (skin permeability) | -1.152💻 Calculated |
| SMILES | CC=CCCCCCCCC#N🔬 PubChem |
Volatility & Performance
| Fragrance Note | Heart💻 Calculated |
| Volatility Class | Very slow💻 Calculated |
| Persistence Score | 3.1 / 5💻 Calculated |
Odor & Flavor
| Functional Groups | alkene💻 RDKit |
Physical data: PubChem (NIH/NLM), U.S. EPA CompTox Dashboard, EPA OPERA models, RDKit. Odor & flavor: Arctander (Perfume & Flavor Chemicals), Fenaroli's Handbook of Flavor Ingredients, Leffingwell. Thresholds: van Gemert (Compilations of Odour Threshold Values). Regulatory: IFRA Standards 51st, FEMA GRAS. Trade names: Surburg (Common Fragrance & Flavor Materials). All data compiled and cross-referenced for perfumertools.com.
Physicochemical Properties
DTXSID: DTXSID00888941
Physical Properties
| Molecular Weight | 165.28 g/mol🔬 EPA CompTox |
| Density | 0.848 g/cm^3📊 OPERA |
| Boiling Point | 257.647 °C📊 OPERA |
| Melting Point | -16.838 °C📊 OPERA |
| Flash Point | 113.79 °C📊 OPERA |
| Refractive Index | 1.45 Dimensionless📊 OPERA |
| Molar Volume | 197.107 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 3.489 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 3.489 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 3.489 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 5.73 Log10 unitless📊 OPERA |
| Water Solubility | 0.001 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.016 mmHg📊 OPERA |
| Viscosity | 2.636 cP📊 OPERA |
| Surface Tension | 30.206 dyn/cm📊 OPERA |
| Thermal Conductivity | 158.799 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 23.79 Ų💻 Computed |
| H-Bond Donors | 0 count💻 Computed |
| H-Bond Acceptors | 1 count💻 Computed |
| Rotatable Bonds | 7 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 52.982 cm^3/mol📊 OPERA |
| Polarizability | 21.004 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.
