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C12-15 PARETH-11.

Valuable CAS 68131-39-5 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A versatile non-ionic surfactant that bridges oil and water phases to create stable formulations. Its amphiphilic molecular design enables effective emulsification while maintaining gentleness across all skin types. Functions primarily as a formulation workhorse rather than an active treatment ingredient.

emulsifying surfactant solubilizer wetting agent

Science

Utilizes its dual-natured molecular structure—featuring a lipophilic C12-15 carbon chain paired with a hydrophilic PEG-11 head—to reduce interfacial tension between oil and water phases, enabling stable emulsion formation and enhanced product spreadability.


Research

High confidence
Effective range 5–15%
Optimal

3%

Key findings

  1. 01 Human Repeat Insult Patch Tests on related alkyl PEG ethers showed zero sensitization events and no clinically significant irritation at 5-15% concentrations
  2. 02 Rabbit primary irritation studies demonstrated minimal dermal irritation potential even at 50% concentration

Transparency

Not commonly dusted

As a functional emulsifier rather than a marketed active, this ingredient is rarely featured prominently in marketing claims or used in ineffective concentrations for appearance purposes.


The Formula

Solubility
Water
Optimal pH 5 – 7
0 7 14

Stability

Demonstrates exceptional stability across acidic, neutral, and alkaline conditions with superior resistance to strong bases compared to other ethoxylated alcohols. Cloud point occurs at 60-64°C in 10% NaCl solution.

Conflicts

  • Strong oxidizing agents
  • Strong reducing agents

Safety

CIR Status
Safe as used
Max tested
3%
Pregnancy
Safe
Sensitization risk Low

Safety contingent on proper manufacturing processes that minimize 1,4-dioxane and ethylene oxide impurities through vacuum stripping or equivalent purification methods.


Your Skin

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

Our Assessment

Valuable

A reliable, well-tolerated emulsifier that enables stable formulations without compromising skin compatibility across all types.


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