Heptanal, 6-hydroxy-2,6-dimethyl- (CAS 62439-42-3) — Citrus Top to middle Note Fragrance Ingredient
Heptanal, 6-_hydroxy-_2,_6-_dimethyl-
CAS 62439-42-3
What Is Heptanal, 6-_hydroxy-_2,_6-_dimethyl-?
Heptanal, 6-hydroxy-2,6-dimethyl- is a synthetic fragrance ingredient used in perfumery to add fresh, citrusy, and slightly woody nuances. It’s found in modern fragrances, particularly those aiming for a crisp, clean character. This molecule helps perfumers create dynamic top notes that transition smoothly into heart accords, making it valuable for contemporary scent design.
Safety Profile
GENERALLY SAFEWhat Does Heptanal, 6-_hydroxy-_2,_6-_dimethyl- Smell Like?
Heptanal, 6-hydroxy-2,6-dimethyl- opens with a bright, aldehydic burst reminiscent of freshly peeled citrus zest and morning dew. As it evolves, the scent reveals a crisp green character like crushed stems, softening into a subtle woody-musky drydown. The hydroxy group lends an aqueous freshness, while the dimethyl modification adds structural stability to the scent profile. In dilution, it behaves like a solar accord – radiant at first, then settling into a skin-hugging warmth.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Chemistry, Properties & Perfumer Guide
The Chemistry
This modified heptanal derivative belongs to the aliphatic aldehyde family, characterized by its C7 backbone with hydroxyl and two methyl substituents. The hydroxy group at position 6 increases polarity compared to simple aldehydes, while the dimethyl substitution at positions 2 and 6 creates steric hindrance that modifies both reactivity and odor characteristics. Industrial synthesis typically involves controlled oxidation of corresponding alcohols or selective reduction of unsaturated precursors.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.1-1% | Up to 2% | Fresh top note component |
| Functional Fragrance | 0.05-0.5% | Up to 1% | Clean scent modifier |
Classic Accords
Tip: Use with citrus oils to extend their freshness and prevent rapid evaporation.
Alternatives & Comparisons
Similar aldehydic character but with more orange-like tones and less green nuance.
Offers comparable freshness with added melon-like aquatic effects.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions currently apply to this material.
RIFM Assessment
Complete safety assessment data not yet available in RIFM databases.
Sustainability
As a synthetic material, this ingredient avoids agricultural land use but requires petrochemical feedstocks. Production typically employs modern catalytic processes with good atom economy. Future green chemistry approaches may enable bio-based synthesis from renewable resources.
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