alpha,2,2,3-tetramethylcyclopent-3-ene-1-butyraldehyde (CAS 65114-03-06) — Green Top to Middle Note Fragrance Ingredient

Green · Woody

alpha,2,2,3-tetramethylcyclopent-3-ene-1-butyraldehyde

CAS 65114-03-06

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

What Is alpha,2,2,3-tetramethylcyclopent-3-ene-1-butyraldehyde?

Alpha,2,2,3-tetramethylcyclopent-3-ene-1-butyraldehyde is a synthetic fragrance ingredient primarily used in modern perfumery. It is found in various consumer products like fine fragrances and body care items. This compound contributes unique olfactory characteristics, often enhancing freshness and complexity in fragrance formulations.

Safety Profile

USE WITH AWARENESS
Generally safeUse with awarenessProfessional use
Approved for use in regulated products
Potential sensitizer – check concentration
CAS
65114-03-06
Formula
Mixture
MW
Variable
Odor Family
Green · Woody
Layer 1 · Enthusiast

What Does alpha,2,2,3-tetramethylcyclopent-3-ene-1-butyraldehyde Smell Like?

Alpha,2,2,3-tetramethylcyclopent-3-ene-1-butyraldehyde presents a fresh, slightly green, and aldehydic character with woody undertones. It evolves from a crisp top note to a more rounded heart, leaving a subtle woody-resinous trail in the dry-down. The scent profile is reminiscent of a forest breeze with a hint of citrusy sharpness, making it versatile in modern fragrance compositions.

Scent Profile
Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

This synthetic aldehyde belongs to the cyclopentene class, characterized by its complex structure with multiple methyl groups. It is not found in nature and is exclusively produced through chemical synthesis. The compound’s olfactory properties stem from its unique cyclic structure and aldehyde functional group, which contribute to its fresh-green character.

Physical & Chemical Properties

Perfumer Guide

Note Position
Top to Middle
Volatility
Medium (1-3 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance1-3%Up to 5%Adds freshness and complexity
Body Care0.5-1%Up to 2%Used as a fresh modifier

Classic Accords

Tip: Use in trace amounts to enhance freshness without overpowering the composition.

Alternatives & Comparisons

1
Hexyl Cinnamaldehyde CAS 101-86-0

Offers similar fresh character with better stability and lower sensitization potential.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

No specific IFRA restrictions. General guidelines for aldehydes apply.

RIFM Assessment

Limited safety data available. Use with caution pending further assessment.

Sustainability

As a synthetic molecule, its production is controlled in laboratory settings with minimal environmental impact compared to natural extracts. The synthetic origin ensures consistent quality and reduces pressure on natural resources.

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References

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

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