Poly(oxy-1,2-ethanediyl), .alpha.-9-octadecenyl-.omega.-hydroxy-, (Z)- (CAS 9004-98-2) — Citrus Base Note Fragrance Ingredient

ByThe Good Scents
Citrus · Floral

Poly(oxy-1,2-ethanediyl), .alpha.-9-octadecenyl-.omega.-hydroxy-, (Z)-

CAS 9004-98-2

Origin
synthetic
Note
Base
IFRA
Use with awareness
Data as of: Apr 2026

What Is Poly(oxy-1,2-ethanediyl), .alpha.-9-octadecenyl-.omega.-hydroxy-, (Z)-?

Poly(oxy-1,2-ethanediyl), .alpha.-9-octadecenyl-.omega.-hydroxy-, (Z)- is a synthetic polymer used in various industrial and personal care applications. It is commonly found in cosmetics, lubricants, and other formulations where emulsification and stabilization are required. This ingredient helps improve product texture and performance, making it a valuable component in many everyday items.

Safety Profile

USE WITH AWARENESS
Generally safeUse with awarenessProfessional use
✓ Safe in regulated products
⚠ Potential skin irritant – check labels
CAS
9004-98-2
Formula
Mixture
MW
Variable
Odor Family
Citrus · Floral
Layer 1 · Enthusiast

What Does Poly(oxy-1,2-ethanediyl), .alpha.-9-octadecenyl-.omega.-hydroxy-, (Z)- Smell Like?

This synthetic polymer is typically odorless or has a very faint, neutral scent. Its primary role is functional rather than olfactory, contributing to the physical properties of formulations rather than their fragrance profiles. It is often used as a base or carrier in perfumery to enhance the stability and longevity of other aromatic compounds.

Layer 2

2D Molecular Structure

9-Octadecen-1-ol-ethylene oxide copolymer

SMILES: CCCCCCCC\C=C/CCCCCCCCOCCO |lp:18:2,21:2,Sg:n:20,19,18::ht|

Chemistry, Properties & Perfumer Guide

The Chemistry

Poly(oxy-1,2-ethanediyl), .alpha.-9-octadecenyl-.omega.-hydroxy-, (Z)- is a synthetic polymer derived from ethylene oxide and oleyl alcohol. It belongs to the class of polyoxyethylene ethers, which are known for their surfactant and emulsifying properties. The polymer is synthesized through the polymerization of ethylene oxide, resulting in a chain of repeating oxyethylene units terminated by an oleyl group and a hydroxyl group. This structure provides both hydrophobic and hydrophilic characteristics, making it useful in a variety of formulations.

Physical & Chemical Properties

Boiling PointN/A
DensityN/A

Perfumer Guide

Note Position
Base
Volatility
Low
Blending
Functional
ApplicationTypical %RangeNotes
Personal Care1-5%Up to 10%Emulsifier and stabilizer
Cosmetics2-7%Up to 15%Texture enhancer

Classic Accords

Tip: Use as a base to improve the stability and texture of fragrances and cosmetic formulations.

Alternatives & Comparisons

1
PEG-40 Hydrogenated Castor Oil CAS 61788-85-0

A similar emulsifier with enhanced solubility and stability in water-based formulations.

2
Polysorbate 20 CAS 9005-64-5

A non-ionic surfactant with excellent emulsifying properties for fragrances and oils.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

No specific restrictions under IFRA guidelines.

GHS Classification

H315 Skin irritation H319 Eye irritation

RIFM Assessment

No specific safety assessment by RIFM available.

Sustainability

This synthetic polymer is produced through industrial processes, with environmental impact depending on manufacturing practices. While it is not derived from natural sources, its synthetic nature allows for consistent quality and performance. Proper disposal and handling are recommended to minimize environmental impact.

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References

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

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    Ingredient Data Sheet

    CAS 9004-98-2
    Data Sources & Attribution
    Physical 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.

    Physicochemical Properties

    DTXSID: DTXSID1027714

    Physical Properties

    Density 0.986 g/cm^3🔬 EPA CTX
    Boiling Point 177.5 °C🔬 EPA CTX
    Melting Point 13 °C🔬 EPA CTX

    Partition & Solubility

    LogP (Octanol-Water) 7.5 Log10 unitless🔬 EPA CTX

    Molecular Descriptors

    Topological Polar Surface Area 29.46 Ų💻 Computed
    H-Bond Donors 1 count💻 Computed
    H-Bond Acceptors 2 count💻 Computed
    Rotatable Bonds 18 count💻 Computed
    Aromatic Rings 0 count💻 Computed

    Data Sources:

    🔬 EPA Experimental data from U.S. EPA CompTox Chemicals Dashboard & CTX APIs. 📊 OPERA Predicted using EPA's OPERA QSAR models. 💻 Computed Calculated from SMILES using RDKit.

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