2,6-Octadienal, 3,7-dimethyl-, acid-isomerized (CAS 90480-35-6) — Citrus Top Note Fragrance Ingredient
2,6-Octadienal, 3,7-dimethyl-, acid-isomerized
CAS 90480-35-6
What Is 2,6-Octadienal, 3,7-dimethyl-, acid-isomerized?
2,6-Octadienal, 3,7-dimethyl-, acid-isomerized is a synthetic fragrance ingredient used to create fresh, citrusy notes in perfumes and scented products. It’s found in air fresheners, cleaning products, and some citrus-forward fragrances. This molecule matters because it provides a cost-effective alternative to natural citrus oils while offering superior stability in formulations.
Safety Profile
USE WITH AWARENESSWhat Does 2,6-Octadienal, 3,7-dimethyl-, acid-isomerized Smell Like?
This synthetic aldehyde delivers a bright, zesty citrus burst reminiscent of freshly peeled lemons with a green, slightly metallic edge. The initial sharpness evolves into a cleaner, more floral citrus character as it dries down, leaving a subtle woody-herbaceous trail. Unlike natural citrus oils, it maintains remarkable tenacity while avoiding the terpenic harshness of cheaper citrus materials.
Chemistry, Properties & Perfumer Guide
The Chemistry
2,6-Octadienal, 3,7-dimethyl-, acid-isomerized belongs to the family of unsaturated aldehydes. The acid-isomerized form creates a more stable configuration than its natural counterparts. Industrial synthesis typically involves controlled acid-catalyzed isomerization of citral or related terpenoids. The resulting molecule exhibits improved oxidative stability compared to natural citrus aldehydes while maintaining similar olfactory properties.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Solubility | Soluble in alcohol and oils |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Citrus note enhancer |
| Household Products | 0.1-0.5% | Up to 1% | Freshness booster |
Classic Accords
Tip: Use in citrus bases to extend longevity and prevent rapid evaporation of top notes.
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 precautions apply.
GHS Classification
RIFM Assessment
Not currently evaluated by RIFM. Considered safe at current usage levels.
Sustainability
As a synthetic material, this ingredient reduces pressure on natural citrus oil supplies. Production typically uses petroleum-derived precursors, though some manufacturers are exploring bio-based routes. Proper handling minimizes environmental release.
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