Science
Mechanism of Action
Operating as a surfactant, PEG-5 Isononanoate effectively reduces the surface tension of water, allowing for the efficient removal of fat and soil particles from the skin. As an emulsifying agent, it decreases interfacial tension between oil and water phases, enabling their stable and homogeneous dispersion within cosmetic products. Like other polyethylene glycols, this ingredient forms hydrogen bonds with water molecules, thereby providing long-term hydration, reducing transepidermal water loss, and supporting the skin's natural barrier function.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
PEG-5 Isononanoate exhibits stability under normal conditions of use. While it contains hydrolyzable functionalities, no significant hydrolysis is anticipated within the environmental pH range of 4 to 9.
Conflicts
- Formulators should exercise caution when combining PEG-5 Isononanoate with other ingredients whose increased dermal absorption is a concern, due to its potential to enhance skin penetration.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that PEG-5 Isononanoate is safe for use in cosmetics, with typical application concentrations observed at ≤ 2.5%. This ingredient is not considered a dermal irritant, genotoxic, or a sensitizer. However, formulators are advised to be mindful of its potential to increase the dermal penetration of other substances, particularly when formulating with ingredients where systemic absorption is a consideration.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-5 Isononanoate is a versatile and safe ingredient, valuable for its emulsifying, cleansing, and hydrating properties, though careful formulation is advised due to its penetration-enhancing potential.
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References
Sources