3-[trans-4-(2-methylpropyl)cyclohexyl]propanal (CAS 1315250-67-9) — Woody Middle Note Fragrance Ingredient

ByThe Good Scents
Woody · Musky

3-[trans-4-(2-methylpropyl)cyclohexyl]propanal

CAS 1315250-67-9

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

What Is 3-[trans-4-(2-methylpropyl)cyclohexyl]propanal?

3-[trans-4-(2-methylpropyl)cyclohexyl]propanal is a synthetic fragrance ingredient used in modern perfumery. It’s found in premium personal care products and niche fragrances. This aldehyde contributes to fresh, clean scent profiles that evolve beautifully on skin. Its molecular structure allows for excellent longevity while maintaining a light, airy character.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ IFRA compliant at standard usage levels
⚠ Newer ingredient – limited long-term data
CAS
1315250-67-9
Formula
Mixture
MW
Variable
Odor Family
Woody · Musky
Layer 1 · Enthusiast

What Does 3-[trans-4-(2-methylpropyl)cyclohexyl]propanal Smell Like?

This synthetic aldehyde opens with a crisp, ozonic freshness reminiscent of mountain air after rain. The heart reveals subtle woody-amber undertones with a clean, almost metallic edge. Dry-down brings a sophisticated musky warmth that lingers close to skin. Imagine the scent of freshly laundered linen blended with the faintest whisper of pine needles and sea salt.

Scent Profile
Layer 2

2D Molecular Structure

Cyclohexanepropanal, 4-(2-methylpropyl)-, trans-

SMILES: CC(C)C[C@H]1CC[C@H](CCC=O)CC1

Chemistry, Properties & Perfumer Guide

The Chemistry

This cyclohexylpropanal derivative belongs to the class of synthetic aldehydes with branched alkyl substitutions. The trans configuration of the 4-isobutyl group creates a rigid molecular geometry that influences its odor profile. Industrial synthesis typically involves hydrogenation of corresponding unsaturated precursors followed by controlled oxidation. The isobutyl side chain enhances volatility while the cyclohexane ring provides stability.

Physical & Chemical Properties

Perfumer Guide

Note Position
Middle
Volatility
Moderate (2-4 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance1-3%Up to 5%Fresh-modern accords
Body Care0.5-1.5%Up to 2%Clean scent profiles

Classic Accords

Tip: Use with ionones to soften the metallic edge and enhance diffusion.

Alternatives & Comparisons

1
Florhydral CAS 125109-85-5

Similar clean-aldehydic character but with more pronounced floral aspects.

2
Triplal CAS 68039-49-6

For greener, leafier versions of this fresh-modern effect.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

No current IFRA restrictions. Approved under Amendment 49.

RIFM Assessment

Under evaluation by RIFM as part of newer materials assessment program.

Sustainability

As a synthetic material, this ingredient avoids natural resource depletion concerns. Manufacturing uses standard petrochemical feedstocks with typical industry environmental controls. The molecule’s stability suggests minimal environmental persistence. Future green chemistry routes may improve its sustainability profile.

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References

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

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    Ingredient Data Sheet

    CAS 1315250-67-9

    Physical Properties

    Molecular Weight196.33 g/mol🔬 PubChem
    LogP (Octanol-Water)4.3🔬 PubChem
    Boiling Point255 °C🔬 EPA CompTox
    Vapor Pressure0.0646 mmHg @ 25°C📊 OPERA
    Flash Point121.2 °C🔬 EPA CompTox
    Involatility Index0.005💻 Calculated
    log Kp (skin permeability)-0.845💻 Calculated
    SMILESCC(C)CC1CCC(CC1)CCC=O🔬 PubChem

    Volatility & Performance

    Fragrance NoteHeart💻 Calculated
    Volatility ClassVery slow💻 Calculated
    Persistence Score2.6 / 5💻 Calculated

    Odor & Flavor

    Primary Descriptorsmuskywoody• leffingwell
    Functional Groupsaldehyde💻 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: DTXSID10889287

    Physical Properties

    Molecular Weight 196.334 g/mol🔬 EPA CompTox
    Density 0.856 g/cm^3📊 OPERA
    Boiling Point 258.305 °C📊 OPERA
    Melting Point 11.656 °C📊 OPERA
    Flash Point 112.384 °C📊 OPERA
    Refractive Index 1.441 Dimensionless📊 OPERA
    Molar Volume 228.813 cm^3/mol📊 OPERA

    Partition & Solubility

    LogP (Octanol-Water) 4.679 Log10 unitless📊 OPERA
    LogD (pH 5.5) 4.679 Log10 unitless📊 OPERA
    LogD (pH 7.4) 4.679 Log10 unitless📊 OPERA
    LogKoa (Octanol-Air) 6.35 Log10 unitless📊 OPERA
    Water Solubility 0 mol/L📊 OPERA
    Henry's Law Constant 0.001 atm-m3/mole📊 OPERA

    Transport Properties

    Vapor Pressure 0.029 mmHg📊 OPERA
    Viscosity 7.888 cP📊 OPERA
    Surface Tension 29.424 dyn/cm📊 OPERA
    Thermal Conductivity 130.532 mW/(m*K)📊 OPERA

    Molecular Descriptors

    Topological Polar Surface Area 17.07 Ų💻 Computed
    H-Bond Donors 0 count💻 Computed
    H-Bond Acceptors 1 count💻 Computed
    Rotatable Bonds 5 count💻 Computed
    Aromatic Rings 0 count💻 Computed
    Molar Refractivity 60.368 cm^3/mol📊 OPERA
    Polarizability 23.932 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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