Nonyl alcohol (CAS 0143-08-08) — Floral Middle Note Fragrance Ingredient
Nonyl alcohol
CAS 0143-08-08
What Is Nonyl alcohol?
Nonyl alcohol is a synthetic fragrance ingredient used as a modifier in perfumes and functional products. It adds subtle floral and citrus nuances. Commonly found in laundry detergents, soaps, and some perfumes for its ability to enhance other ingredients without overpowering them. This versatile alcohol helps balance compositions by providing mild freshness and slight green characteristics.
Safety Profile
GENERALLY SAFEWhat Does Nonyl alcohol Smell Like?
Nonyl alcohol presents a mild, slightly floral aroma with hints of citrus and green undertones. It evolves subtly on the skin, starting with a fresh, clean scent that dries down to a soft, almost waxy finish. The odor profile is not dominant but acts as a harmonizer, blending seamlessly with other ingredients to create balanced accords.
Chemistry, Properties & Perfumer Guide
The Chemistry
Nonyl alcohol is a straight-chain fatty alcohol with nine carbon atoms. It is typically synthesized via the hydroformylation of octene followed by hydrogenation. This process yields a mixture of isomers, primarily linear and branched nonanol. The synthetic route ensures consistency in quality and odor profile, making it a reliable ingredient for perfumery.
Physical & Chemical Properties
| Boiling Point | 213-215 °C |
|---|---|
| Density | 0.827 g/cm³ |
| Flash Point | 93 °C |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-3% | Up to 5% | Used as a modifier |
| Functional Products | 0.5-2% | Up to 3% | Adds mild freshness |
Classic Accords
Tip: Use nonyl alcohol to soften harsh top notes and enhance floral-citrus accords.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No restrictions under current IFRA standards.
GHS Classification
RIFM Assessment
RIFM has assessed nonyl alcohol as safe for use in current practices.
Sustainability
Nonyl alcohol is synthesized from petrochemical sources, with no significant environmental impact when used responsibly. Its production is efficient, with minimal waste. Future developments may explore bio-based routes to enhance sustainability.
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References
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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