Hydroxycitronellal, indole condensation products (CAS 68908-82-7) — Floral Middle Note Fragrance Ingredient
Hydroxycitronellal, indole condensation products
CAS 68908-82-7
What Is Hydroxycitronellal, indole condensation products?
Hydroxycitronellal, indole condensation products are synthetic fragrance materials that create a unique floral-jasmine effect with powdery undertones. They’re found in fine perfumes and some personal care products where a sophisticated floralcy is desired. These molecules bring a balanced intensity to floral compositions, offering perfumers a tool that bridges freshness with deeper, more persistent floral characteristics. Their ability to enhance jasmine-like notes without being overpowering makes them valuable in creating elegant, long-lasting scents.
Safety Profile
USE WITH AWARENESSWhat Does Hydroxycitronellal, indole condensation products Smell Like?
This synthetic molecule unfolds with an initial burst of dewy, almost aquatic floralcy reminiscent of lily-of-the-valley, quickly revealing a complex heart that marries the creaminess of indole with the crystalline freshness of hydroxycitronellal. As it dries down, it develops a velvety, powdery texture similar to heliotropin, with subtle animalic undertones that add depth without becoming cloying. The overall effect is like sunlight filtering through white floral petals – radiant yet soft, with exceptional tenacity on skin that makes it particularly useful for floral bases.
Chemistry, Properties & Perfumer Guide
The Chemistry
These condensation products are Schiff bases formed between hydroxycitronellal and indole derivatives, creating stable molecules that exhibit unique olfactive properties distinct from their parent compounds. The synthesis typically involves acid-catalyzed condensation under controlled conditions to prevent polymerization. The resulting products show increased substantivity compared to hydroxycitronellal alone, with the indole moiety providing enhanced floral character and diffusion. Their molecular structure combines the fresh floral aspects of aliphatic aldehydes with the rich complexity of nitrogen-containing heterocycles.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow viscous liquid |
|---|---|
| Solubility | Soluble in alcohol and oils |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 3% | Floral enhancer in white floral bases |
| Personal Care | 0.1-0.5% | Up to 1% | Used in premium floral formulations |
Classic Accords
Tip: Use in trace amounts to add floral depth without overwhelming the composition.
Alternatives & Comparisons
For brighter, more straightforward floralcy without indolic complexity
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No specific restrictions under current IFRA standards (Amendment 51).
GHS Classification
RIFM Assessment
RIFM has reviewed similar condensation products but no specific assessment for this material is published.
Sustainability
As a synthetic material, it avoids pressure on natural resources but requires careful manufacturing controls. The condensation process is atom-efficient, producing minimal waste. Formulators should consider the full lifecycle impact when using materials with potential sensitization concerns.
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References
- IFRA Standards Library (2023) IFRA
- Bickers et al. (2005). Fragrance contact dermatitis. Dermatitis. PMID 16490911
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 68908-82-7Physical data: PubChem (NIH/NLM), U.S. EPA CompTox Dashboard, EPA OPERA models, RDKit. Odor & flavor: Arctander (Perfume & Flavor Chemicals), Fenaroli's Handbook of Flavor Ingredients, Leffingwell. Thresholds: van Gemert (Compilations of Odour Threshold Values). Regulatory: IFRA Standards 51st, FEMA GRAS. Trade names: Surburg (Common Fragrance & Flavor Materials). All data compiled and cross-referenced for perfumertools.com.
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