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C11-13 PARETH-9.

Valuable CAS - / CLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A non-ionic surfactant and emulsifier that creates stable oil-in-water formulations while providing gentle cleansing properties. This ingredient reduces surface tension between immiscible phases, making it particularly effective in cleansers and moisturizers where smooth texture and effective dirt removal are essential.

Surfactant Emulsifier Cleansing agent

Science

Functions by reducing surface tension between oil and water phases through its balanced hydrophilic-lipophilic properties, forming stable emulsions and organizing into micelles that encapsulate sebum and impurities for removal during cleansing.


Research

High confidence
Effective range 5–10%
Optimal

7.5%

Key findings

  1. 01 CIR Safety Assessment demonstrating non-sensitizing properties at 5-10% concentrations in leave-on formulations
  2. 02 International Journal of Toxicology study confirming enhanced penetration capabilities for other actives

Transparency

Not commonly dusted

As a functional emulsifier and surfactant, this ingredient serves essential formulation purposes rather than marketing claims, making dusting unlikely


The Formula

Solubility
Water
Optimal pH 3 – 11
0 7 14

Stability

Exceptionally stable across wide pH ranges due to non-ionic structure, resistant to hydrolysis in both acidic and alkaline environments

Synergies

  • Other non-ionic emulsifiers
  • Active ingredient penetration enhancement

Conflicts

  • Strong oxidizing agents
  • Highly concentrated anionic surfactants

Safety

CIR Status
Safe as used
Max tested
25%
Pregnancy
Safe
Sensitization risk Low

Safe when properly formulated to avoid irritation; 25% limit applies to rinse-off products while leave-on formulations typically use under 5%


Your Skin

Yes Normal
Yes Dry
Yes Oily
No Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

A reliable, well-tolerated emulsifier that effectively stabilizes formulations while providing gentle cleansing benefits across multiple skin types.


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References