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Moumoujus

C12-13 PARETH-5 CARBOXYLIC ACID.

Valuable CAS 70750-17-3 / CLEANSING, SURFACTANT - CLEANSING

A pH-adaptive hybrid surfactant that delivers exceptional gentleness through its bulky ethoxylated structure, preventing deep skin penetration while maintaining effective cleansing properties. This intelligent molecule switches between anionic and nonionic forms based on formulation pH, optimizing both foam quality and emulsion stability.

Summary

cleansing surfactant - cleansing emulsifying

Science

Mechanism of Action

Creates a large hydrophilic head group that remains on the skin surface rather than penetrating the stratum corneum, delivering mild cleansing action. Above pH 5.0, it functions as an anionic surfactant for superior foam generation, while below pH 4.5, it transitions to a nonionic form that stabilizes emulsions and provides gentle keratolytic effects to aid dead skin cell removal.

Research

Clinical Evidence

High confidence
Effective range ≤10%
Optimal

6%

Key findings

  1. 01 Human Repeat Insult Patch Tests at 6.0% showed no dermal sensitization or cumulative irritation on chemically analogous compounds
  2. 02 Health Canada established 10.0% as maximum safe concentration for leave-on applications

Transparency

Dusting Analysis

Not commonly dusted

As a functional surfactant and emulsifier, meaningful concentrations are required for efficacy, making dusting uncommon in legitimate formulations

The Formula

Formulation

Solubility
Both
Optimal pH 4 – 7.5
0 7 14

Stability

Demonstrates remarkable stability across extreme pH ranges (2-12) and resists destabilization from hard water minerals and high-electrolyte environments

Synergies

  • Mild co-surfactants in sulfate-free systems
  • Oil-in-water emulsion stabilizers

Conflicts

  • Highly concentrated cationic polymers
  • Strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
10%
Sensitization risk Low

International regulatory threshold of 10% for leave-on products established to minimize irritation potential from the acid form

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

An exceptionally gentle, pH-smart surfactant that delivers effective cleansing without compromising skin barrier integrity, making it ideal for sensitive skin formulations.

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References

Sources