Dihydroisocaryophyllene epoxide (CAS 1209-61-6) — Woody Middle to base Note Fragrance Ingredient

ByThe Good Scents
Woody · Balsamic

Dihydroisocaryophyllene epoxide

CAS 1209-61-6

Origin
synthetic
Note
Middle to base
IFRA
Use with awareness
Data as of: Apr 2026

What Is Dihydroisocaryophyllene epoxide?

Dihydroisocaryophyllene epoxide is a synthetic fragrance ingredient used in modern perfumery to add woody, amber-like nuances. It’s found in niche fragrances and some body care products. This molecule matters because it helps create sophisticated dry-down effects without relying on natural extracts, offering consistent quality and sustainability advantages.

Safety Profile

USE WITH AWARENESS
Generally safeUse with awarenessProfessional use
✓ Stable under normal use conditions
⚠ Limited safety data available
CAS
1209-61-6
Formula
Mixture
MW
Variable
Odor Family
Woody · Balsamic
Layer 1 · Enthusiast

What Does Dihydroisocaryophyllene epoxide Smell Like?

Dihydroisocaryophyllene epoxide unfolds with an initial woody-green character reminiscent of freshly split cedarwood, gradually revealing a warm ambery heart with subtle spicy undertones. The dry-down presents a smooth, slightly sweet woody-musk foundation that blends seamlessly with other base notes. Its evolution resembles the transition from a forest clearing to polished antique furniture.

Scent Profile
Layer 2

2D Molecular Structure

5-Oxatricyclo[8.2.0.04,6]dodecane, 4,9,12,12-tetramethyl-

SMILES: CC1CCC2OC2(C)CCC2C1CC2(C)C

Chemistry, Properties & Perfumer Guide

The Chemistry

Dihydroisocaryophyllene epoxide belongs to the bicyclic sesquiterpene oxide class, structurally related to caryophyllene oxide. While not found in significant quantities in nature, it’s synthesized through epoxidation of dihydroisocaryophyllene. The synthetic route typically involves hydrogenation of β-caryophyllene followed by selective oxidation. The epoxide group contributes to its stability and distinctive odor profile compared to its parent hydrocarbon.

Physical & Chemical Properties

Perfumer Guide

Note Position
Middle to base
Volatility
Medium (2-6 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance0.5-2%Up to 5%Woody-amber modifier
Functional Fragrance0.1-0.5%Up to 1%Base note stabilizer

Classic Accords

Tip: Use to add depth to woody compositions without overpowering floral elements.

Alternatives & Comparisons

1
Caryophyllene oxide CAS 1139-30-6

More herbal character with similar stability, suitable when a greener top note is desired.

2
Iso E Super CAS 54464-57-2

For broader woody-amber effects with greater diffusion power.

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 currently available.

Sustainability

As a synthetic material, dihydroisocaryophyllene epoxide avoids the ecological pressures associated with harvesting natural materials. Its production can be optimized for minimal waste and energy efficiency. The synthetic origin ensures consistent quality without seasonal variations.

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References

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

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    Ingredient Data Sheet

    CAS 1209-61-6

    Physical Properties

    Molecular Weight222.37 g/mol🔬 PubChem
    LogP (Octanol-Water)4.2🔬 PubChem
    Boiling Point270 °C🔬 EPA CompTox
    Vapor Pressure0.0001 mmHg @ 25°C📊 OPERA
    Flash Point98 °C🔬 EPA CompTox
    log Kp (skin permeability)-1.074💻 Calculated
    SMILESCC1CCC2C(O2)(CCC3C1CC3(C)C)C🔬 PubChem

    Volatility & Performance

    Fragrance NoteBase💻 Calculated
    Volatility ClassVery slow💻 Calculated
    Persistence Score9.2 / 5💻 Calculated

    Odor & Flavor

    Functional Groupsether💻 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: DTXSID50862599

    Physical Properties

    Molecular Weight 222.372 g/mol🔬 EPA CompTox
    Density 0.937 g/cm^3📊 OPERA
    Boiling Point 268.469 °C📊 OPERA
    Melting Point 39.962 °C📊 OPERA
    Flash Point 95.291 °C📊 OPERA
    Refractive Index 1.473 Dimensionless📊 OPERA
    Molar Volume 239.123 cm^3/mol📊 OPERA

    Partition & Solubility

    LogP (Octanol-Water) 4.51 Log10 unitless📊 OPERA
    LogD (pH 5.5) 4.51 Log10 unitless📊 OPERA
    LogD (pH 7.4) 4.51 Log10 unitless📊 OPERA
    LogKoa (Octanol-Air) 6.91 Log10 unitless📊 OPERA
    Water Solubility 0 mol/L📊 OPERA
    Henry's Law Constant 0.001 atm-m3/mole📊 OPERA

    Transport Properties

    Vapor Pressure 0.006 mmHg📊 OPERA
    Surface Tension 31.68 dyn/cm📊 OPERA

    Molecular Descriptors

    Topological Polar Surface Area 12.53 Ų💻 Computed
    H-Bond Donors 0 count💻 Computed
    H-Bond Acceptors 1 count💻 Computed
    Rotatable Bonds 0 count💻 Computed
    Aromatic Rings 0 count💻 Computed
    Molar Refractivity 67.077 cm^3/mol📊 OPERA
    Polarizability 26.592 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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