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Moumoujus

C12-13 PARETH-1.

Valuable CAS - / CLEANSING, SKIN CONDITIONING - EMOLLIENT

A mild non-ionic surfactant and emollient that functions more like a conditioning fatty alcohol than a traditional cleanser due to its minimal ethoxylation. Its dual nature allows it to stabilize emulsions while forming a protective barrier that helps reduce water loss from the skin.

Summary

surfactant emollient emulsifying cleansing

Science

Mechanism of Action

Functions as a gentle surfactant by reducing surface tension to stabilize oil-in-water emulsions, while simultaneously acting as an emollient by depositing a thin occlusive film that prevents trans-epidermal water loss and provides skin conditioning benefits

Research

Clinical Evidence

Medium confidence
Effective range ≤5%
Optimal

N/A

Key findings

  1. 01 Rabbit dermal studies with undiluted C12-13 Pareth-1 demonstrated negligible to slight irritation, confirming excellent skin tolerance
  2. 02 Related alkyl PEG ethers at 3% concentration showed contact sensitization in only 1.77% of subjects (weak reactions) and 0.34% (strong reactions)

Transparency

Dusting Analysis

Not commonly dusted

Not a commonly dusted ingredient due to its specialized surfactant function and established safety profile at typical use concentrations

The Formula

Formulation

Solubility
Oil
Optimal pH 3 – 11
0 7 14

Stability

Demonstrates exceptional pH stability across wide range due to non-ionic nature and resistance to hydrolysis; particularly effective as co-emulsifier in oil-rich formulations

Synergies

  • Oil-soluble emollients
  • Other non-ionic surfactants

Conflicts

  • Strong oxidizing agents
  • High concentrations of anionic surfactants

Safety

Safety Profile

CIR Status
Safe as used
Max tested
5%
Sensitization risk Low

CIR Expert Panel approved with requirement for monitoring manufacturing impurities including 1,4-dioxane and residual ethylene oxide; must be formulated to be non-irritating

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A well-tolerated multifunctional ingredient that combines gentle cleansing with skin conditioning properties, making it particularly useful in mild cleansing formulations.

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