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Moumoujus

BUTYLENE GLYCOL ISOSTEARATE.

Valuable / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A multifunctional ester that serves as both an emollient and penetration enhancer, working to smooth skin texture while facilitating deeper delivery of active ingredients. This oil-soluble compound mimics natural skin barrier lipids and helps reduce water loss, making it particularly effective in moisturizing formulations.

Summary

emollient skin conditioning surfactant cleansing emulsifying penetration enhancer

Science

Mechanism of Action

Works by filling intercellular gaps in the stratum corneum with lipid-like molecules that strengthen the skin barrier, while simultaneously increasing the fluidity of skin's lipid matrix to enhance active ingredient penetration and reduce transepidermal water loss.

Research

Clinical Evidence

Medium confidence
Effective range 0.5–10%
Optimal

1%

Key findings

  1. 01 Demonstrates barrier-mimicking properties and penetration enhancement at 1-10% concentrations
  2. 02 Shows preservative-boosting synergy at 0.5-1% levels by improving antimicrobial membrane interaction

Transparency

Dusting Analysis

Not commonly dusted

Typically used at meaningful concentrations for functional benefits rather than marketing purposes

The Formula

Formulation

Solubility
Oil
Optimal pH 4 – 8
0 7 14

Stability

Ester structure makes it vulnerable to hydrolysis below pH 3.0 or above pH 9.0, but remains stable in typical emulsion systems

Synergies

  • phenoxyethanol
  • heavy oils for improved spreadability

Conflicts

  • Strong oxidizing agents
  • Strong acids
  • Strong bases

Safety

Safety Profile

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

Included in CIR safety assessment of Alkyldiol Alkyl Esters with non-sensitizing and non-irritating profile at typical use levels

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A well-researched multifunctional ingredient that effectively combines barrier support with active delivery enhancement at reasonable concentrations.

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References

Sources