4,7-Decadienal, (4Z,7Z)- (CAS 22644-09-03) — Citrus Top Note Fragrance Ingredient
4,_7-_Decadienal, (4Z,_7Z)_-
CAS 22644-09-03
What Is 4,_7-_Decadienal, (4Z,_7Z)_-?
4,7-Decadienal is a synthetic fragrance ingredient that creates fresh, marine-like scents. It’s often used in aquatic and ozonic perfumes to mimic the crispness of sea air. This molecule matters because it helps create modern, clean fragrance profiles without relying on natural marine ingredients, which can be scarce or ethically challenging to source.
Safety Profile
USE WITH AWARENESSWhat Does 4,_7-_Decadienal, (4Z,_7Z)_- Smell Like?
A razor-sharp marine aldehyde that bursts with oceanic freshness, like the first breath of sea spray hitting sun-warmed rocks. The initial impression is intensely ozonic—think crushed seaweed and salt crystals—before softening into a clean, cucumber-like watery note. Unlike heavier marine materials, it maintains an airy, almost weightless quality throughout evaporation, leaving behind a subtle melon-rind dryness that integrates beautifully with citrus and violet leaf accords.
Chemistry, Properties & Perfumer Guide
The Chemistry
4,7-Decadienal belongs to the unsaturated aldehyde family, characterized by two conjugated double bonds at the 4 and 7 positions (Z-configuration). This structural feature makes it highly reactive and gives it the distinctive marine odor profile. Industrial synthesis typically involves controlled oxidation of corresponding dienes or Wittig reactions with carefully tuned stereochemistry to achieve the required (Z,Z) configuration. The molecule’s volatility and reactivity make stabilization in fragrance bases challenging—often requiring antioxidant systems.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.1-0.5% | Up to 1% | Marine top note accent |
| Functional Fragrance | 0.05-0.2% | Up to 0.3% | Clean laundry boosters |
| Personal Care | 0.01-0.1% | Up to 0.15% | Shampoo freshness modifier |
Classic Accords
Tip: Stabilize in ethanol-heavy bases and avoid prolonged exposure to air during compounding.
Alternatives & Comparisons
More stable marine-ozonic with less green character and better longevity in functional products.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No current IFRA restrictions under Amendment 51.
RIFM Assessment
RIFM evaluation pending as of 2023 due to limited exposure data.
Sustainability
As a synthetic material, 4,7-Decadienal avoids pressure on marine ecosystems but requires energy-intensive synthesis. Some producers now use bio-based feedstocks for the precursor molecules. Its low usage levels (<1% in most formulas) result in minimal environmental load compared to traditional marine ingredients like ambergris.
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