(Z)-6,10-Dimethylundeca-5,9-dien-2-yl acetate (CAS 3239-37-0) — Floral Middle Note Fragrance Ingredient

ByThe Good Scents
Floral · Green

(Z)-6,10-Dimethylundeca-5,9-dien-2-yl acetate

CAS 3239-37-0

Origin
synthetic
Note
Middle
IFRA
Generally safe
Data as of: Apr 2026

What Is (Z)-6,10-Dimethylundeca-5,9-dien-2-yl acetate?

(Z)-6,10-Dimethylundeca-5,9-dien-2-yl acetate is a synthetic fragrance ingredient used in perfumes and personal care products. It contributes to floral and fruity accords. This molecule matters because it helps create modern, long-lasting scent profiles while being more sustainable than some natural alternatives.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ No major restrictions
⚠ Limited safety data available
CAS
3239-37-0
Formula
Mixture
MW
Variable
Odor Family
Floral · Green
Layer 1 · Enthusiast

What Does (Z)-6,10-Dimethylundeca-5,9-dien-2-yl acetate Smell Like?

This acetate ester delivers a fresh, floral-green opening reminiscent of crushed leaves and unripe fruit. The initial burst evolves into a heart of dewy rose petals with subtle citrus undertones. Dry-down reveals a clean woody-musky character that lingers close to skin. The overall effect is like walking through a sunlit orchard where green stems and white flowers mingle.

Scent Profile
Layer 2

2D Molecular Structure

5,9-Undecadien-2-ol, 6,10-dimethyl-, 2-acetate, (5Z)-

SMILES: CC(CC\C=C(\C)CCC=C(C)C)OC(C)=O

Chemistry, Properties & Perfumer Guide

The Chemistry

(Z)-6,10-Dimethylundeca-5,9-dien-2-yl acetate belongs to the class of unsaturated fatty acid esters. It is synthesized through esterification reactions using corresponding alcohols and acetic acid derivatives. The Z-configuration at the 5,9-diene position is crucial for its odor characteristics. Industrial production typically employs acid-catalyzed processes with careful control of stereochemistry.

Physical & Chemical Properties

Perfumer Guide

Note Position
Middle
Volatility
Medium (2-6 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance1-3%0.5-5%Floral-green modifier
Soap0.5-1%0.1-2%Stable in alkaline conditions

Classic Accords

Tip: Use with ionones to enhance floral diffusion.

Alternatives & Comparisons

1
Geranyl acetate CAS 105-87-3

More rosy character with similar volatility profile

2
Linalyl acetate CAS 115-95-7

Softer floral-lavender effect for delicate compositions

Layer 3

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, this acetate avoids agricultural land use. Production can utilize bio-based feedstocks through green chemistry approaches. The molecule’s stability reduces formulation waste compared to more volatile naturals.

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References

    Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.

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    Ingredient Data Sheet

    CAS 3239-37-0

    Physical Properties

    Molecular Weight238.37 g/mol🔬 PubChem
    LogP (Octanol-Water)4.7🔬 PubChem
    Boiling Point273 °C🔬 EPA CompTox
    Vapor Pressure0.0138 mmHg @ 25°C📊 OPERA
    Flash Point85.5 °C🔬 EPA CompTox
    Involatility Index0.001💻 Calculated
    log Kp (skin permeability)-0.817💻 Calculated
    SMILESCC(CCC=C(C)CCC=C(C)C)OC(=O)C🔬 PubChem

    Volatility & Performance

    Fragrance NoteHeart💻 Calculated
    Volatility ClassVery slow💻 Calculated
    Persistence Score4.5 / 5💻 Calculated

    Odor & Flavor

    Primary Descriptorsfloralgreen• leffingwell
    Functional Groupsesteretheralkene💻 RDKit
    Data Sources & Attribution
    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: DTXSID701213087

    Physical Properties

    Molecular Weight 238.371 g/mol🔬 EPA CompTox
    Density 0.884 g/cm^3📊 OPERA
    Boiling Point 277.434 °C📊 OPERA
    Melting Point -20.658 °C📊 OPERA
    Flash Point 94.313 °C📊 OPERA
    Refractive Index 1.46 Dimensionless📊 OPERA
    Molar Volume 266.827 cm^3/mol📊 OPERA

    Partition & Solubility

    LogP (Octanol-Water) 5.093 Log10 unitless📊 OPERA
    LogD (pH 5.5) 5.093 Log10 unitless📊 OPERA
    LogD (pH 7.4) 5.093 Log10 unitless📊 OPERA
    LogKoa (Octanol-Air) 7.55 Log10 unitless📊 OPERA
    Water Solubility 0 mol/L📊 OPERA
    Henry's Law Constant 0 atm-m3/mole📊 OPERA

    Transport Properties

    Vapor Pressure 0.007 mmHg📊 OPERA
    Viscosity 3.859 cP📊 OPERA
    Surface Tension 27.54 dyn/cm📊 OPERA
    Thermal Conductivity 137.503 mW/(m*K)📊 OPERA

    Molecular Descriptors

    Topological Polar Surface Area 26.3 Ų💻 Computed
    H-Bond Donors 0 count💻 Computed
    H-Bond Acceptors 2 count💻 Computed
    Rotatable Bonds 7 count💻 Computed
    Aromatic Rings 0 count💻 Computed
    Molar Refractivity 73.076 cm^3/mol📊 OPERA
    Polarizability 28.97 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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