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PEG-25 BUTYLENE GLYCOL ISOSTEARATE.

Valuable / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

PEG-25 BUTYLENE GLYCOL ISOSTEARATE is a polyethylene glycol derivative primarily utilized for its ability to blend disparate phases in cosmetic formulations. It functions as an emulsifier and surfactant, contributing to the stability and textural integrity of products.

Summary

Surfactant Emulsifying Cleansing Emollient Solubility Enhancer Penetration Enhancer

Science

Mechanism of Action

This ingredient operates as a surfactant, effectively lowering surface tension between different components within a formulation. Its key role as an emulsifier is to facilitate the formation and long-term stabilization of emulsions, such as oil-in-water mixtures. It can also act as a cleansing agent and, as a PEG derivative, may offer emollient properties and enhance the solubility and transdermal penetration of other active compounds.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Clinical assessments on a related ingredient, PEG-25 Propylene Glycol Stearate, demonstrated nonallergenic properties in guinea pig sensitization tests at concentrations of 25% and 50% (in petrolatum).
  2. 02 Studies found PEG-25 Propylene Glycol Stearate to be nonirritating to mildly irritating to the eyes of rabbits and practically nonirritating to the skin of rabbits at 2.0% when incorporated into an antiperspirant product and tested via single-insult occlusive patch tests.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Polyethylene glycols (PEGs) generally exhibit robust stability against heat, acids, and bases. While specific optimal pH data for PEG-25 BUTYLENE GLYCOL ISOSTEARATE is not extensively documented, a related compound, PEG-25 Stearate, maintains stability within a pH range of 5.0 to 7.5 in a 1% aqueous solution.

Safety

Safety Profile

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

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that related ingredients, such as PEG-25 Propylene Glycol Stearate, are safe for use in cosmetic formulations at concentrations not exceeding 10%. An updated safety assessment in 2010 removed the general caveat regarding PEG use on damaged skin. However, it remains a consideration that PEGs can potentially enhance the penetration of other ingredients, which could be a concern if formulations include undesirable substances. Furthermore, some PEGs may contain trace impurities like ethylene oxide and 1,4-dioxane as byproducts of their manufacturing.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-25 BUTYLENE GLYCOL ISOSTEARATE is a valuable functional ingredient crucial for its emulsifying and surfactant properties, enabling the development of stable and well-dispersed cosmetic formulations.

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