cis-Tetrahydro-2-isobutyl-4-methylpyran-4-ol (CAS 65418-69-1) — Woody Heart Note Fragrance Ingredient

ByThe Good Scents
Woody · Floral

cis-Tetrahydro-2-isobutyl-4-methylpyran-4-ol

CAS 65418-69-1

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

What Is cis-Tetrahydro-2-isobutyl-4-methylpyran-4-ol?

cis-Tetrahydro-2-isobutyl-4-methylpyran-4-ol is a synthetic fragrance ingredient used to add woody, floral nuances to perfumes. Consumers encounter it in fine fragrances and personal care products. This compound matters because it provides longevity and complexity to scent profiles, enhancing the overall olfactory experience.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ Safe in regulated products
⚠ Check for potential sensitization
CAS
65418-69-1
Formula
Mixture
MW
Variable
Odor Family
Woody · Floral
Layer 1 · Enthusiast

What Does cis-Tetrahydro-2-isobutyl-4-methylpyran-4-ol Smell Like?

This synthetic molecule offers a rich, woody-floral aroma with subtle green undertones. Initially, it presents a crisp, slightly herbal top note that evolves into a heart of warm, floral sweetness. The dry-down reveals a lingering woody base, reminiscent of aged cedarwood with a touch of floral musk. Its complexity makes it a versatile building block in modern perfumery.

Scent Profile
Layer 2

2D Molecular Structure

rel-(2R,4R)-Tetrahydro-4-methyl-2-(2-methylpropyl)-2H-pyran-4-ol

SMILES: CC(C)C[C@H]1C[C@@](C)(O)CCO1

Chemistry, Properties & Perfumer Guide

The Chemistry

cis-Tetrahydro-2-isobutyl-4-methylpyran-4-ol is a synthetic pyran derivative, commonly used in perfumery for its woody-floral characteristics. It is typically synthesized through catalytic hydrogenation of corresponding pyran precursors. The molecule’s structure allows for excellent stability and longevity in fragrance formulations.

Physical & Chemical Properties

Boiling PointN/A
DensityN/A

Perfumer Guide

Note Position
Heart
Volatility
Medium (2-4 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance1-5%Up to 10%Adds woody-floral complexity
Personal Care0.5-2%Up to 5%Provides longevity

Classic Accords

Tip: Use in moderation to avoid overpowering other notes.

Alternatives & Comparisons

1
Isobutyl Quinoline CAS 93-19-6

A more intense woody note, suitable for leather and tobacco accords.

2
Vertofix CAS 68039-49-6

A woody-amber alternative with better stability in alkaline formulations.

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

RIFM safety assessment pending.

Sustainability

As a synthetic molecule, it is produced in controlled environments, minimizing environmental impact. Sustainable sourcing of raw materials and energy-efficient processes are prioritized in its production.

Explore cis-Tetrahydro-2-isobutyl-4-methylpyran-4-ol

Browse essential oils and aroma compounds.

Browse on iHerb →

Affiliate disclosure: we may earn a small commission at no extra cost to you.

References

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

    Report a data error

    Ingredient Data Sheet

    CAS 65418-69-1

    Physical Properties

    Molecular Weight172.26 g/mol🔬 PubChem
    LogP (Octanol-Water)1.9🔬 PubChem
    log Kp (skin permeability)-2.402💻 Calculated
    SMILESCC(C)CC1CC(CCO1)(C)O🔬 PubChem

    Odor & Flavor

    Primary Descriptorsfloralwoody• leffingwell
    Functional Groupsalcoholether💻 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: DTXSID001534876

    Physical Properties

    Molecular Weight 172.268 g/mol🔬 EPA CompTox

    Partition & Solubility

    LogP (Octanol-Water) 1.962 dimensionless💻 Computed

    Molecular Descriptors

    Topological Polar Surface Area 29.46 Ų💻 Computed
    H-Bond Donors 1 count💻 Computed
    H-Bond Acceptors 2 count💻 Computed
    Rotatable Bonds 2 count💻 Computed
    Aromatic Rings 0 count💻 Computed
    Molar Refractivity 49.05 cm^3/mol💻 Computed

    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.

    Similar Posts