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Moumoujus

CAPRYLIC/CAPRIC TRIGLYCERIDE PEG-4 ESTERS.

Valuable CAS 246864-39-1 / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A multifunctional lipid-derived ester that acts as a bridge between oil and water phases, offering both gentle cleansing and skin-smoothing properties. It is highly valued in precision skincare for its ability to stabilize complex formulas while enhancing the delivery of fat-soluble active ingredients.

Summary

Emollient Non-ionic Surfactant Solubilizer Emulsifying Agent Penetration Enhancer

Science

Mechanism of Action

This non-ionic surfactant and emollient works by reducing interfacial tension to create stable microemulsions. On the skin's surface, it fills the gaps between corneocytes to refine texture and establishes a light, breathable film that minimizes transepidermal water loss (TEWL) while simultaneously acting as a carrier to transport lipophilic actives deeper into the skin.

Research

Clinical Evidence

High confidence
Effective range 0.25–6%
Optimal

6%

Key findings

  1. 01 A 28-day clinical study utilizing a 6% concentration demonstrated significant reductions in localized skin redness alongside improved suppleness and soothing sensations when applied twice daily.
  2. 02 Research into nanoemulsion delivery systems indicates that concentrations between 0.25% and 0.30% are highly effective at facilitating the deep penetration of active ingredients.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.25%
Red flag below
0.1%

Because this ingredient functions effectively as a penetration enhancer at very low levels (0.25%), it is rarely 'dusted.' However, if a product claims soothing or redness-reduction benefits based on this ingredient, it should ideally be formulated closer to the 6% clinical benchmark.

The Formula

Formulation

Solubility
Both
Optimal pH 4 – 9
0 7 14

Stability

Exhibits excellent oxidative stability and remains effective across a wide pH spectrum. With an HLB value of approximately 5-6, it is primarily a lipophilic emulsifier suited for self-emulsifying systems.

Synergies

  • Lipophilic actives
  • Self-emulsifying drug delivery systems (SEDDS)
  • Non-ionic surfactants

Conflicts

  • Nitrosating agents

Safety

Safety Profile

CIR Status
Safe as used
Pregnancy
Safe
Sensitization risk Low

Reviewed by the CIR Expert Panel in 2017 and concluded safe. To meet pharmaceutical-grade safety standards, manufacturers utilize vacuum stripping to ensure trace 1,4-dioxane levels remain below 1 ppm.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

An exceptionally versatile ingredient that combines the barrier-supporting benefits of an emollient with the technical precision of a penetration-enhancing solubilizer.

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References

Sources