2-Furfuryleneoctanal (CAS 67801-17-6) — Woody Base Note Fragrance Ingredient

ByThe Good Scents
Woody · Sweet

2-Furfuryleneoctanal

CAS 67801-17-6

Origin
synthetic
Note
Base
IFRA
Use with awareness
Data as of: Apr 2026

What Is 2-Furfuryleneoctanal?

2-Furfuryleneoctanal is a synthetic fragrance ingredient used to add warm, woody, and slightly spicy nuances to perfumes. It’s commonly found in fine fragrances and personal care products. This molecule enhances depth and longevity in compositions, making it valuable for creating sophisticated scent profiles.

Safety Profile

USE WITH AWARENESS
Generally safeUse with awarenessProfessional use
✓ Safe in regulated products
⚠ Potential skin sensitizer – check concentrations
CAS
67801-17-6
Formula
Mixture
MW
Variable
Odor Family
Woody · Sweet
Layer 1 · Enthusiast

What Does 2-Furfuryleneoctanal Smell Like?

2-Furfuryleneoctanal offers a complex aroma profile with initial warm, woody notes that evolve into a slightly spicy, caramel-like sweetness. The dry-down reveals a lingering, slightly animalic undertone, adding depth and intrigue to fragrances. Its behavior is reminiscent of amber, with a smooth transition from top to base notes.

Scent Profile
Layer 2

2D Molecular Structure

Octanal, 2-(2-furanylmethylene)-

SMILES: CCCCCCC(C=O)=CC1=CC=CO1

Chemistry, Properties & Perfumer Guide

The Chemistry

2-Furfuryleneoctanal is a synthetic aldehyde with a furan ring, contributing to its unique olfactory properties. It is typically synthesized through controlled oxidation processes. The molecule’s structure allows for excellent stability and longevity in fragrance formulations, making it a favorite among perfumers for base note compositions.

Physical & Chemical Properties

Boiling PointN/A
DensityN/A

Perfumer Guide

Note Position
Base
Volatility
Low (hours to days)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance1-3%Up to 5%Adds depth and warmth
Personal Care0.5-2%Up to 3%Enhances longevity

Classic Accords

Tip: Use sparingly to avoid overpowering other notes.

Alternatives & Comparisons

1
Ambraldehyde CAS XXX-XX-X

Offers similar warm, woody notes with less spiciness.

2
Furfuryl Mercaptan CAS XXX-XX-X

Provides a more pronounced roasted, coffee-like nuance.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

No specific IFRA restrictions.

RIFM Assessment

Under review by RIFM for safety assessment.

Sustainability

As a synthetic ingredient, 2-Furfuryleneoctanal is produced in controlled environments with minimal environmental impact. Its synthetic origin ensures consistent quality and reduces reliance on natural resources.

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References

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

    Report a data error

    Ingredient Data Sheet

    CAS 67801-17-6

    Physical Properties

    Molecular Weight206.28 g/mol🔬 PubChem
    LogP (Octanol-Water)3.9🔬 PubChem
    Boiling Point274 °C🔬 EPA CompTox
    Vapor Pressure0.0063 mmHg @ 25°C📊 OPERA
    Flash Point140.1 °C🔬 EPA CompTox
    Involatility Index0.0005💻 Calculated
    log Kp (skin permeability)-1.189💻 Calculated
    SMILESCCCCCCC(=CC1=CC=CO1)C=O🔬 PubChem

    Volatility & Performance

    Fragrance NoteHeart💻 Calculated
    Volatility ClassVery slow💻 Calculated
    Persistence Score4.7 / 5💻 Calculated

    Odor & Flavor

    Functional Groupsaldehydealkenearomatic💻 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: DTXSID9070612

    Physical Properties

    Molecular Weight 206.285 g/mol🔬 EPA CompTox
    Density 0.992 g/cm^3📊 OPERA
    Boiling Point 284.197 °C📊 OPERA
    Melting Point 37.809 °C📊 OPERA
    Flash Point 141.258 °C📊 OPERA
    Refractive Index 1.507 Dimensionless📊 OPERA
    Molar Volume 209.364 cm^3/mol📊 OPERA

    Partition & Solubility

    LogP (Octanol-Water) 3.776 Log10 unitless📊 OPERA
    LogD (pH 5.5) 3.776 Log10 unitless📊 OPERA
    LogD (pH 7.4) 3.776 Log10 unitless📊 OPERA
    LogKoa (Octanol-Air) 7.05 Log10 unitless📊 OPERA
    Water Solubility 0.002 mol/L📊 OPERA
    Henry's Law Constant 0 atm-m3/mole📊 OPERA

    Transport Properties

    Vapor Pressure 0.002 mmHg📊 OPERA
    Viscosity 4.807 cP📊 OPERA
    Surface Tension 34.631 dyn/cm📊 OPERA

    Molecular Descriptors

    Topological Polar Surface Area 30.21 Ų💻 Computed
    H-Bond Donors 0 count💻 Computed
    H-Bond Acceptors 2 count💻 Computed
    Rotatable Bonds 7 count💻 Computed
    Aromatic Rings 1 count💻 Computed
    Molar Refractivity 62.269 cm^3/mol📊 OPERA
    Polarizability 24.685 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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