(Z)-4-Hepten-1-ol (CAS 6191-71-5) — Green Top Note Fragrance Ingredient
(Z)-4-Hepten-1-ol
CAS 6191-71-5
What Is (Z)-4-Hepten-1-ol?
(Z)-4-Hepten-1-ol is a synthetic fragrance molecule used to create fresh, green, and slightly fruity nuances in perfumes. It’s found in modern floral and citrus compositions. This ingredient adds a crisp, diffusive quality that helps brighten fragrance formulas without overpowering other notes.
Safety Profile
USE WITH AWARENESSWhat Does (Z)-4-Hepten-1-ol Smell Like?
(Z)-4-Hepten-1-ol delivers a sharp green opening reminiscent of freshly crushed leaves and unripe apples. The initial burst evolves into a cleaner, slightly aquatic heart with hints of melon rind. As it dries down, a subtle fatty undertone emerges, like the waxy coating on cucumber skin. The overall effect is fresh yet complex, providing lift to floral compositions while adding a modern, slightly metallic edge.
Chemistry, Properties & Perfumer Guide
The Chemistry
(Z)-4-Hepten-1-ol belongs to the unsaturated aliphatic alcohol class, characterized by its cis-configured double bond at the 4-position. This synthetic molecule is produced through selective hydrogenation of heptynol precursors or via Grignard reactions. The Z-configuration is crucial for its odor profile, as the E-isomer exhibits markedly different sensory characteristics. The molecule’s volatility stems from its relatively small size and polar hydroxyl group.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.1-0.5% | Up to 1% | Green modifier |
| Functional Fragrances | 0.05-0.2% | Up to 0.5% | Freshness booster |
Classic Accords
Tip: Use sparingly to avoid a ‘green soap’ effect in floral compositions.
Alternatives & Comparisons
More intense grassy-green character with higher impact at lower concentrations.
Softer green profile with earthy undertones for more balanced compositions.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions currently apply.
RIFM Assessment
Not currently evaluated by RIFM.
Sustainability
As a synthetic material, (Z)-4-Hepten-1-ol has minimal environmental impact during production. Its efficient synthesis from petrochemical feedstocks makes it more sustainable than some natural green notes that require extensive agricultural resources.
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