(1a,2a,5a)-2,5-dimethylcyclohex-3-ene-1-carbaldehyde (CAS 35145-02-09) — Woody Middle Note Fragrance Ingredient
(1a,2a,5a)-2,5-dimethylcyclohex-3-ene-1-carbaldehyde
CAS 35145-02-09
What Is (1a,2a,5a)-2,5-dimethylcyclohex-3-ene-1-carbaldehyde?
(1a,2a,5a)-2,5-dimethylcyclohex-3-ene-1-carbaldehyde is a synthetic fragrance ingredient used in modern perfumery. It contributes a unique woody-green character to compositions. This molecule is valued for its ability to add structural complexity to fragrances without being easily recognizable as a single note.
Safety Profile
USE WITH AWARENESSWhat Does (1a,2a,5a)-2,5-dimethylcyclohex-3-ene-1-carbaldehyde Smell Like?
This synthetic aldehyde presents a crisp, woody-green opening with subtle citrus undertones. As it evolves, it reveals a dry, almost paper-like quality reminiscent of freshly cut lumber. The dry-down carries faint balsamic nuances that blend seamlessly with other woody materials. Its odor profile sits between the sharpness of pinene and the smoothness of sandalwood derivatives.
Chemistry, Properties & Perfumer Guide
The Chemistry
(1a,2a,5a)-2,5-dimethylcyclohex-3-ene-1-carbaldehyde belongs to the cyclohexene carbaldehyde class of fragrance materials. Its synthesis typically involves Diels-Alder reactions followed by selective oxidation. The stereochemistry at positions 1, 2, and 5 creates a rigid molecular structure that contributes to its distinctive odor profile. As a synthetic material, it doesn’t occur in nature but was designed to mimic certain aspects of woody essential oils.
Physical & Chemical Properties
| Molecular Class | Cyclohexene carbaldehyde |
|---|---|
| Odor Type | Woody-green |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Used as woody-green modifier |
| Functional Fragrance | 0.1-1% | Up to 3% | Adds structural complexity |
Classic Accords
Tip: Use as a bridge between citrus top notes and woody base materials.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No specific IFRA restrictions. General aldehyde guidelines apply.
RIFM Assessment
Under evaluation by RIFM as of current data.
Sustainability
As a synthetic material, this compound is produced through controlled chemical processes with minimal environmental impact. Its efficient synthesis route makes it more sustainable than some naturally-derived woody materials that require extensive plant harvesting.
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