1-Penten-3-one, 1-(3,6-dimethyl-3-cyclohexen-1-yl)-2-methyl-, (1E)- (CAS 2639151-39-4) — Green Top to middle Note Fragrance Ingredient

ByThe Good Scents
Green · Woody

1-Penten-3-one, 1-(3,6-dimethyl-3-cyclohexen-1-yl)-2-methyl-, (1E)-

CAS 2639151-39-4

Origin
synthetic
Note
Top to middle
IFRA
Use with awareness
Data as of: Apr 2026

What Is 1-Penten-3-one, 1-(3,6-dimethyl-3-cyclohexen-1-yl)-2-methyl-, (1E)-?

1-Penten-3-one, 1-(3,6-dimethyl-3-cyclohexen-1-yl)-2-methyl-, (1E)- is a synthetic fragrance ingredient used in modern perfumery. It contributes unique green, woody nuances to compositions. This molecule is found in niche fragrances seeking innovative olfactory profiles.

Safety Profile

USE WITH AWARENESS
Generally safeUse with awarenessProfessional use
⚠ Potential sensitizer – use caution
⚠ Limited safety data available
CAS
2639151-39-4
Formula
Mixture
MW
Variable
Odor Family
Green · Woody
Layer 1 · Enthusiast

What Does 1-Penten-3-one, 1-(3,6-dimethyl-3-cyclohexen-1-yl)-2-methyl-, (1E)- Smell Like?

This molecule offers a sharp, green opening reminiscent of crushed leaves and unripe fruit. The heart reveals woody undertones with a subtle metallic edge. Dry-down presents a clean, slightly camphoraceous character that lingers close to the skin. Like a forest after rain – simultaneously fresh and earthy.

Scent Profile
Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

1-Penten-3-one derivatives belong to the unsaturated ketones class. The specific structure features a conjugated system that contributes to its olfactory properties. Synthesis typically involves condensation reactions of appropriate aldehydes with methyl ketones. The (1E)- configuration is crucial for the desired odor profile.

Physical & Chemical Properties

Perfumer Guide

Note Position
Top to middle
Volatility
Medium (2-4 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance0.1-0.5%Up to 1%Used for green accords
Functional Fragrance0.05-0.2%Up to 0.5%For freshness effects

Classic Accords

Tip: Use sparingly to add cutting-edge greenness to contemporary compositions.

Alternatives & Comparisons

1
Stemone CAS 67634-15-5

For similar green effects with better stability and safety profile.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

Not currently restricted by IFRA.

RIFM Assessment

No RIFM safety assessment available at this time.

Sustainability

Synthetic production allows controlled environmental impact. No known natural sources reduce ecological pressure.

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References

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

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    Ingredient Data Sheet

    CAS 2639151-39-4
    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.

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