Cyclopentanol, 1-ethyl-2-(3-methylbutyl)- (CAS 1465004-85-6) — Woody Base Note Fragrance Ingredient

ByThe Good Scents
Woody · Musky

Cyclopentanol, 1-ethyl-2-(3-methylbutyl)-

CAS 1465004-85-6

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

What Is Cyclopentanol, 1-ethyl-2-(3-methylbutyl)-?

Cyclopentanol, 1-ethyl-2-(3-methylbutyl)- is a synthetic fragrance ingredient used in modern perfumery. It contributes unique woody and musky nuances to fragrances. This molecule is found in niche and designer perfumes where innovative scent profiles are desired.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ Safe in regulated products
⚠ Limited safety data – use cautiously
CAS
1465004-85-6
Formula
Mixture
MW
Variable
Odor Family
Woody · Musky
Layer 1 · Enthusiast

What Does Cyclopentanol, 1-ethyl-2-(3-methylbutyl)- Smell Like?

Cyclopentanol, 1-ethyl-2-(3-methylbutyl)- offers a complex olfactory profile with woody, musky, and slightly green facets. The scent evolves from a fresh, slightly green top note to a warm, woody heart with subtle musky undertones. Its dry-down is smooth and persistent, adding depth and sophistication to fragrance compositions.

Scent Profile

In Famous Fragrances

Fragrance associations may not reflect actual formulations.

Unknown(Unknown, 0)

This ingredient is relatively new and not yet widely documented in commercial fragrances.

Layer 2

2D Molecular Structure

Cyclopentanol, 1-ethyl-2-(3-methylbutyl)-

SMILES: CCC1(O)CCCC1CCC(C)C

Chemistry, Properties & Perfumer Guide

The Chemistry

Cyclopentanol, 1-ethyl-2-(3-methylbutyl)- is a synthetic alcohol derivative with a cyclopentane backbone. It is synthesized through organic reactions involving cyclopentanol derivatives and alkylation processes. The molecule’s structure contributes to its woody and musky odor characteristics.

Physical & Chemical Properties

Boiling PointN/A
DensityN/A

Perfumer Guide

Note Position
Base
Volatility
Medium (2-4 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance1-3%Up to 5%Adds woody-musky depth

Classic Accords

Tip: Use in small quantities to enhance woody and musky accords.

Alternatives & Comparisons

1
Ambroxan CAS 6790-58-5

A well-known synthetic alternative for woody-ambergris notes with better safety data.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

No IFRA restrictions currently apply.

RIFM Assessment

No RIFM assessment available.

Sustainability

This synthetic ingredient is produced in laboratories, reducing environmental impact compared to natural alternatives. Its synthetic origin ensures consistent quality and supply.

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References

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

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    Ingredient Data Sheet

    CAS 1465004-85-6

    Physical Properties

    Molecular Weight184.32 g/mol🔬 PubChem
    LogP (Octanol-Water)3.7🔬 PubChem
    Boiling Point235 °C🔬 EPA CompTox
    Vapor Pressure0.5655 mmHg @ 25°C📊 OPERA
    Flash Point100.9 °C🔬 EPA CompTox
    Involatility Index0.0449💻 Calculated
    log Kp (skin permeability)-1.197💻 Calculated
    SMILESCCC1(CCCC1CCC(C)C)O🔬 PubChem

    Volatility & Performance

    Fragrance NoteHeart💻 Calculated
    Volatility ClassSlow💻 Calculated
    Persistence Score0.5 / 5💻 Calculated

    Odor & Flavor

    Primary Descriptorsmuskywoody• leffingwell
    Functional Groupsalcohol💻 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: DTXSID30889305

    Physical Properties

    Molecular Weight 184.323 g/mol🔬 EPA CompTox
    Density 0.874 g/cm^3🔬 EPA CTX
    Boiling Point 235.163 °C🔬 EPA CTX
    Melting Point 40.509 °C📊 OPERA
    Flash Point 100.91 °C🔬 EPA CTX
    Refractive Index 1.458 Dimensionless📊 OPERA
    Molar Volume 209.174 cm^3/mol📊 OPERA

    Partition & Solubility

    LogP (Octanol-Water) 2.4 Log10 unitless🔬 EPA CTX
    LogD (pH 5.5) 3.713 Log10 unitless📊 OPERA
    LogD (pH 7.4) 3.713 Log10 unitless📊 OPERA
    LogKoa (Octanol-Air) 7.76 Log10 unitless📊 OPERA
    Water Solubility 0.001 mol/L📊 OPERA
    Henry's Law Constant 0 atm-m3/mole📊 OPERA

    Transport Properties

    Vapor Pressure 0.566 mmHg🔬 EPA CTX
    Viscosity 20.05 cP📊 OPERA
    Surface Tension 31.173 dyn/cm📊 OPERA
    Thermal Conductivity 129.075 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 4 count💻 Computed
    Aromatic Rings 0 count💻 Computed
    Molar Refractivity 57.065 cm^3/mol📊 OPERA
    Polarizability 22.622 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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