Science
Mechanism of Action
This ingredient operates by attracting and holding water within the stratum corneum, effectively boosting skin moisture levels and minimizing transepidermal water loss to combat dryness. It further improves skin elasticity and texture. Additionally, its solvent properties aid in dissolving and dispersing other formulation components, while its surfactant capabilities reduce surface tension to facilitate gentle cleansing and impurity removal.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The Methoxy PEG portion of the molecule generally exhibits stable chemical characteristics and demonstrates resistance to hydrolysis.
Conflicts
- Potential for carcinogenic impurities (ethylene oxide, 1,4-dioxane) if the compound is not sufficiently pure.
- Possibility of cross-sensitization reactions with other structurally similar PEG derivatives.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Methoxy PEG-13 Ethyl Polysilsesquioxane is safe for use in cosmetics under current practices and concentrations. However, due to the ethoxylation process involved in its production, there is a possibility of trace amounts of residual ethylene oxide and 1,4-dioxane, both classified as carcinogens. The overall safety profile is therefore highly dependent on the purity of the specific compound used. Furthermore, individuals may experience cross-sensitization with other PEG-based ingredients.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While offering diverse functional benefits and carrying a 'safe as used' CIR status, the crucial dependence on compound purity to avoid potential carcinogenic impurities and unknown irritancy/comedogenicity profiles render its inclusion questionable for precision skincare formulations.
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