Science
Mechanism of Action
As a humectant, PEG-12 attracts water to the skin's outer layers, forming hydrogen bonds with water molecules to provide sustained hydration and reduce water evaporation by forming a light barrier. Beyond hydration, it acts as a solvent, critical for the uniform mixing and even distribution of formulation components. When chemically modified into PEG-12 Dimethicone, it further enhances hydration by creating a breathable film that locks in moisture, optimizes product spreadability, and improves the absorption of beneficial ingredients, simultaneously acting as an emulsifier to impart a smooth, velvety skin feel.
Research
Clinical Evidence
Medium confidenceOptimal usage concentrations for PEG-12 Dimethicone range from 1% for lightweight serums up to 5% for richer creams to enhance emulsion stability, texture, and sensory properties.
Key findings
- 01 Demonstrated ability to enhance emulsion stability, texture, and sensory properties in formulations, specifically observed with PEG-12 Dimethicone.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
PEG-12 exhibits optimal stability within a neutral to slightly acidic pH range of 5.5 to 7.0, ensuring compatibility with most personal care systems. PEG solutions may experience a reduction in pH over time due to aging, a process accelerated by warm temperatures, light, and oxygen. Storing at colder temperatures (-20°C or 4°C) and purging containers with argon can minimize these degradation effects. PEG-12 Dimethicone specifically demonstrates stability in water-based systems.
Conflicts
- Stearyl alcohol (for PEG-12 Dimethicone)
- Stearic acid (for PEG-12 Dimethicone)
- IPM (Isopropyl Myristate) (for PEG-12 Dimethicone)
- Beeswax (for PEG-12 Dimethicone)
- Glycerol (for PEG-12 Dimethicone)
- Lanolin (for PEG-12 Dimethicone)
- Mineral Oil (for PEG-12 Dimethicone)
- Paraffin wax (for PEG-12 Dimethicone)
- Dimethicone, 350cSt (for PEG-12 Dimethicone)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that polyethylene glycol ingredients, including PEG-12, are safe for use in cosmetics, citing low oral and dermal toxicity, minimal irritation to human skin, and no sensitizing effects on intact skin. A 2010 re-review removed previous caveats regarding use on damaged skin, clarifying that significant penetration only occurs with severely compromised skin (second and third-degree burns). The FDA also recognizes PEGs as Generally Recognized As Safe (GRAS). However, the ethoxylation manufacturing process can result in trace amounts of 1,4-dioxane, a potential impurity, which can be effectively controlled through purification steps. It is important to note that PEG-12 Dimethicone has been classified as a 'moderate hazard' by some databases due to these potential contamination concerns.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-12 is a valuable ingredient for enhancing hydration and product formulation, demonstrating broad skin compatibility and a low risk profile on intact skin, with careful consideration for potential trace impurities.
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