Tricyclo[3.3.1.1.(3.7)]decan-2-ol, 4-methyl-8-methylene- (CAS 122760-84-3) — Woody Base Note Fragrance Ingredient

ByThe Good Scents
Woody · Balsamic

Tricyclo[3.3.1.1.(3.7)]decan-2-ol, 4-methyl-8-methylene-

CAS 122760-84-3

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

What Is Tricyclo[3.3.1.1.(3.7)]decan-2-ol, 4-methyl-8-methylene-?

Tricyclo[3.3.1.1.(3.7)]decan-2-ol, 4-methyl-8-methylene- is a synthetic fragrance ingredient used in modern perfumery. It contributes unique woody and amber nuances to compositions. This ingredient matters because it offers perfumers a novel way to create depth and longevity in fragrances without relying on traditional materials.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ Safe in regulated products
⚠ Limited data available – use caution
CAS
122760-84-3
Formula
Mixture
MW
Variable
Odor Family
Woody · Balsamic
Layer 1 · Enthusiast

What Does Tricyclo[3.3.1.1.(3.7)]decan-2-ol, 4-methyl-8-methylene- Smell Like?

This synthetic molecule offers a complex olfactory profile, blending woody, amber, and slightly musky nuances. It evolves on the skin, starting with a crisp, almost metallic edge that softens into a warm, lingering base. The dry-down exhibits remarkable tenacity, leaving a subtle trail reminiscent of aged cedar and sun-warmed stones.

Scent Profile
Layer 2

2D Molecular Structure

Tricyclo[3.3.1.13,7]decan-2-ol, 4-methyl-8-methylene-

SMILES: CC1C2CC3CC1C(O)C(C2)C3=C

Chemistry, Properties & Perfumer Guide

The Chemistry

Tricyclo[3.3.1.1.(3.7)]decan-2-ol, 4-methyl-8-methylene- is a synthetic compound belonging to the tricyclic terpenoid class. Its complex structure contributes to its unique olfactory properties. The molecule’s rigidity and functional groups influence its volatility and scent characteristics, making it particularly valuable in modern perfumery for creating novel accords.

Physical & Chemical Properties

Perfumer Guide

Note Position
Base
Volatility
Low (hours to days)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance1-3%Up to 5%Adds depth and longevity
Functional Fragrance0.5-2%Up to 3%Used in fabric conditioners

Classic Accords

Tip: Use in small quantities to enhance woody and amber accords without overpowering the composition.

Alternatives & Comparisons

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

General reference only. Consult current IFRA Standards Library before formulating.

IFRA Status

No specific IFRA restrictions currently apply.

RIFM Assessment

No RIFM safety assessment available at this time.

Sustainability

As a synthetic material, this ingredient’s environmental impact depends on production methods. Its persistence in the environment should be considered during formulation.

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References

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

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    Ingredient Data Sheet

    CAS 122760-84-3

    Physical Properties

    Molecular Weight178.27 g/mol🔬 PubChem
    LogP (Octanol-Water)2.1🔬 PubChem
    Boiling Point245 °C🔬 EPA CompTox
    Vapor Pressure0.0126 mmHg @ 25°C📊 OPERA
    Flash Point105.3 °C🔬 EPA CompTox
    Involatility Index0.001💻 Calculated
    log Kp (skin permeability)-2.296💻 Calculated
    SMILESCC1C2CC3CC1C(C(C2)C3=C)O🔬 PubChem

    Volatility & Performance

    Fragrance NoteHeart💻 Calculated
    Volatility ClassVery slow💻 Calculated
    Persistence Score3 / 5💻 Calculated

    Odor & Flavor

    Functional Groupsalcoholalkene💻 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: DTXSID80869677

    Physical Properties

    Molecular Weight 178.275 g/mol🔬 EPA CompTox
    Density 1.051 g/cm^3📊 OPERA
    Boiling Point 255.588 °C📊 OPERA
    Melting Point 135.931 °C📊 OPERA
    Flash Point 97.998 °C📊 OPERA
    Refractive Index 1.541 Dimensionless📊 OPERA
    Molar Volume 166.887 cm^3/mol📊 OPERA

    Partition & Solubility

    LogP (Octanol-Water) 2.863 Log10 unitless📊 OPERA
    LogD (pH 5.5) 2.863 Log10 unitless📊 OPERA
    LogD (pH 7.4) 2.863 Log10 unitless📊 OPERA
    LogKoa (Octanol-Air) 8.35 Log10 unitless📊 OPERA
    Water Solubility 0.008 mol/L📊 OPERA
    Henry's Law Constant 0 atm-m3/mole📊 OPERA

    Transport Properties

    Vapor Pressure 0.005 mmHg📊 OPERA
    Viscosity 38.354 cP📊 OPERA
    Surface Tension 37.267 dyn/cm📊 OPERA
    Thermal Conductivity 126.18 mW/(m*K)📊 OPERA

    Molecular Descriptors

    Topological Polar Surface Area 20.23 Ų💻 Computed
    H-Bond Donors 1 count💻 Computed
    H-Bond Acceptors 1 count💻 Computed
    Rotatable Bonds 0 count💻 Computed
    Aromatic Rings 0 count💻 Computed
    Molar Refractivity 52.419 cm^3/mol📊 OPERA
    Polarizability 20.78 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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