Science
Mechanism of Action
This compound, a polyethylene glycol diglycidyl ether (PEGDE), functions primarily through its epoxy groups, enabling crosslinking reactions with amines, acids, and other nucleophiles to form stable polymer networks. In hydrogel systems, this crosslinking improves mechanical integrity and can modulate the release of encapsulated substances. Within broader cosmetic formulations, its PEG structure supports moisture retention by forming hydrogen bonds with water molecules, thereby mitigating trans-epidermal water loss. Additionally, general PEG variants, which this ingredient falls under, can stabilize emulsions, suspend particulates, and modify product texture by acting as emulsifiers, stabilizers, and solvents.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
PEG-13 DIGLYCIDYL ETHER primarily acts as a crosslinking agent or formulation aid, rather than a direct topical skin active. Its utility is in modifying the physical properties of formulations or polymers, not typically at low, 'dusted' percentages for superficial efficacy claims.
The Formula
Formulation
Stability
This ingredient exhibits good thermal stability. However, general PEG solutions can present with a low pH, which may necessitate pH adjustment during formulation. Its epoxy functional groups are highly reactive with amines, acids, and other nucleophilic compounds, which must be considered during compounding.
Conflicts
- amines
- acids
- nucleophiles
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated the broader category of alkyl PEG/PPG ethers, including this ingredient, concluding their safety in cosmetic formulations when they are non-irritating. However, 'Glycol diglycidyl ether,' a related compound, carries hazard classifications including 'Harmful if swallowed,' 'Causes skin irritation,' 'May cause an allergic skin reaction,' and 'Suspected of causing genetic defects' according to ECHA C&L Inventory data. It's crucial that PEG-13 Diglycidyl Ether is formulated carefully to avoid irritation or sensitization. For injectable dermal fillers, residual concentrations below 2 ppm are considered safe. Subcutaneous animal studies at high concentrations (above 10,000 µg/mouse) have shown severe local toxic responses, including epidermal ulceration and hair loss; these findings are specific to subcutaneous administration and not directly translatable to topical use.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-13 Diglycidyl Ether is a valuable formulation component for its crosslinking capabilities and multi-functional properties as an emulsifier, stabilizer, and humectant, but requires careful formulation to ensure it is non-irritating and used within appropriate concentration limits given potential risks.
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