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C11-15 SEC-PARETH-12.

Valuable CAS 68131-40-8 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A non-ionic surfactant that bridges oil and water phases to create stable emulsions in skincare formulations. This ethoxylated secondary alcohol excels at solubilizing fragrances and oils while helping disperse silicone powders into water-based systems.

emulsifying surfactant/cleansing solubilizing

Science

Functions by reducing interfacial tension between oil and water phases through its dual lipophilic (C11-15 secondary alcohol) and hydrophilic (12 ethylene oxide units) structure, enabling formation of stable emulsions and enhanced ingredient dispersion.


Research

Medium confidence
Effective range 0.2–1%
Optimal

0.6%

Key findings

  1. 01 Primary irritation studies on related secondary alkyl ethoxylates demonstrated minimal to mild irritation potential in animal models

Transparency

Not commonly dusted

As a functional emulsifier and surfactant, this ingredient serves essential formulation purposes rather than being added for marketing appeal.


The Formula

Solubility
Water
Optimal pH 3 – 10
0 7 14

Stability

Demonstrates high stability across wide pH range and in presence of electrolytes; non-ionic nature provides compatibility with various surfactant types

Synergies

  • Dimethicone/Vinyl Dimethicone Crosspolymer
  • Anionic surfactants
  • Cationic surfactants
  • Other non-ionic surfactants

Conflicts

  • Strong oxidizing agents
  • Strong acids

Safety

CIR Status
Safe as used
Sensitization risk Low

CIR Expert Panel confirms safety when formulated to be non-irritating; 1,4-dioxane contamination controlled to <10 ppm by manufacturers


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

A reliable workhorse emulsifier that enables stable formulations across all skin types with minimal irritation potential.


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References