Isodecyl alcohol (CAS 25339-17-7) — Citrus Neutral Note Fragrance Ingredient

ByThe Good Scents
Citrus · Floral

Isodecyl alcohol

CAS 25339-17-7

Origin
synthetic
Note
Neutral
IFRA
Generally safe
Data as of: Apr 2026

What Is Isodecyl alcohol?

Isodecyl alcohol is a synthetic ingredient used in industrial applications and some personal care products. It helps stabilize formulations and modify texture. While not common in fine fragrances, it appears in functional products where alcohol properties are needed without strong odor interference.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ Safe in regulated concentrations
⚠ Use protective equipment in industrial handling
CAS
25339-17-7
Formula
Mixture
MW
Variable
Odor Family
Citrus · Floral
Layer 1 · Enthusiast

What Does Isodecyl alcohol Smell Like?

Isodecyl alcohol has a faint, clean alcohol character with minimal odor interference. Its neutral profile makes it useful as a solvent or carrier where scent neutrality is required. The odor profile remains consistent without significant dry-down evolution, functioning more as a physical vehicle than an olfactive component.

Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

Isodecyl alcohol is a branched-chain fatty alcohol produced through synthetic processes like oxo synthesis or Ziegler alcohol production. Its molecular structure features a ten-carbon chain with variable branching patterns that influence physical properties. The industrial synthesis typically involves hydroformylation of nonene followed by hydrogenation.

Physical & Chemical Properties

AppearanceColorless liquid
Boiling Point220-230 °C
Density0.84-0.85 g/cm³

Perfumer Guide

Note Position
Neutral
Volatility
Medium
Blending
Functional
ApplicationTypical %RangeNotes
Industrial Solvent50-90%VariableCarrier fluid
Personal Care1-5%Up to 10%Texture modifier

Classic Accords

Tip: Use primarily as functional ingredient rather than olfactive component.

Alternatives & Comparisons

1
Isotridecyl alcohol CAS 27458-93-1

Higher molecular weight alternative with similar functional properties.

2
2-Ethylhexanol CAS 104-76-7

Smaller branched alcohol with more pronounced odor characteristics.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

General reference only. Consult current IFRA Standards Library before formulating.

IFRA Status

No IFRA restrictions. Listed on IFRA Transparency List.

GHS Classification

H315 Causes skin irritation H319 Causes serious eye irritation

RIFM Assessment

Not currently assessed by RIFM due to industrial rather than fragrance use.

Sustainability

Produced from petrochemical feedstocks. Biodegradability varies by specific isomer structure. Some manufacturers offer bio-based alternatives through advanced synthesis routes.

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References

  1. PubChem Compound Summary for Isodecyl Alcohol PubChem CID

Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.

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