4,7-Decadienal (CAS 934534-30-2) — Green Top-middle Note Fragrance Ingredient
4,_7-_Decadienal
CAS 934534-30-2
What Is 4,_7-_Decadienal?
4,7-Decadienal is a synthetic fragrance ingredient used in modern perfumery to add fresh, green, and marine nuances. You might encounter it in aquatic and citrus-forward fragrances. This aldehyde helps create crisp, contemporary scents that evoke nature without being literal. It’s valued for its ability to bridge floral and citrus notes while adding a subtle metallic edge.
Safety Profile
GENERALLY SAFEWhat Does 4,_7-_Decadienal Smell Like?
4,7-Decadienal opens with a burst of crisp greenness reminiscent of freshly crushed stems, quickly revealing a complex aquatic-metallic character akin to sea breeze hitting sun-warmed metal. The heart develops a waxy, cucumber-like freshness with undertones of melon rind. As it dries down, it leaves a subtle marine musk that blends seamlessly with woody bases. The overall effect is like a walk through a greenhouse after rain – vegetal, clean, and slightly mineralic.
Chemistry, Properties & Perfumer Guide
The Chemistry
4,7-Decadienal is a synthetic unsaturated aldehyde with a ten-carbon chain and conjugated double bonds at positions 4 and 7. Its structure gives it both volatility and reactivity typical of α,β-unsaturated aldehydes. Industrially produced via controlled oxidation of corresponding alcohols or Wittig reactions, this molecule requires careful handling due to its potential for polymerization. The trans configuration is most commonly used in perfumery for its cleaner odor profile.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Solubility | Soluble in alcohol, insoluble in water |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.1-0.5% | Up to 1% | Fresh top note accent |
| Functional Fragrance | 0.01-0.1% | Up to 0.3% | Green-modifier |
Classic Accords
Tip: Stabilize with antioxidants to prevent oxidation during storage.
Alternatives & Comparisons
Simpler saturated aldehyde for cleaner citrus-waxy effects without green nuances.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions currently apply to 4,7-Decadienal.
RIFM Assessment
Not currently evaluated by RIFM – treat as new chemical entity.
Sustainability
As a synthetic material, 4,7-Decadienal has minimal environmental impact in production compared to natural alternatives. Its efficient use at low concentrations reduces ecological footprint. Being petroleum-derived, it avoids agricultural land use but depends on fossil feedstocks. Future green chemistry routes may improve sustainability.
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