Science
Mechanism of Action
As a water-soluble anionic silicone, PEG-8 PHOSPHATE operates by effectively solubilizing other ingredients and stabilizing oil-in-water emulsions. It also mitigates the irritancy of quaternary ammonium compounds and imparts a favorable skin feel.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 An in-vitro study utilizing a 2% concentration of PEG-7 monophosphate (a surrogate for PEG-8 PHOSPHATE) demonstrated low skin penetration (below 5%) through intact, moderately, and highly compromised human skin. While penetration increased 4-6 times in compromised skin, it did not reach 100%.
Transparency
Dusting Analysis
This ingredient is not typically associated with dusting concerns in its common formulation forms, though potential respiratory concerns are noted for inhalable product types.
The Formula
Formulation
Stability
The ingredient demonstrates stability in acidic conditions, with a 1% solution in deionized water exhibiting a pH between 2 and 4. It integrates readily into clear formulations.
Conflicts
- Oxidizing agents
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has not formally assessed PEG-8 PHOSPHATE for cosmetic use. While a related compound, Dimethicone PEG-8 Phosphate, is recognized as safe for limited food uses by the U.S. FDA, concerns persist regarding potential contamination from manufacturing impurities like ethylene oxide and 1,4-dioxane. Its hazard score is elevated for inhalable product forms (e.g., sprays) due to respiratory considerations, and EWG VERIFIED standards prohibit its inclusion without specific substantiation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Despite its functional benefits as an emulsifier and solubilizer with low reported irritancy, PEG-8 PHOSPHATE is questionable for Moumoujus due to its unreviewed safety status by CIR and concerns regarding potential toxic impurities.
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References
Sources