Science
Mechanism of Action
As an amphiphilic silicone polymer, this ingredient contains both water-soluble and silicone-soluble groups, enabling versatile integration into formulations. It establishes a hydrophobic barrier on the stratum corneum, effectively preventing transepidermal water loss and the penetration of exogenous substances. On hair, it functions as a conditioning agent, improving combability, promoting softness and shine, and imparting volume through enhanced fiber alignment and frizz reduction. It is also noted for its UV-resistant and non-greasy properties.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This amphiphilic polymer, integrating polyethylene and polypropylene glycols, exhibits broad viscosity and solubility properties with good skin tolerance. Optimal formulation stability is observed within a pH range of 5.5 to 8.5. A related PEG-8 dimethicone showed 20% hydrolysis over 45 days at pH 5 and 86 days at pH 8, at 1% active concentration, suggesting practical stability within the recommended pH range.
Conflicts
- Not permitted in organic or natural certified cosmetics due to its ethoxylated nature.
Safety
Safety Profile
The CIR Expert Panel has deemed dimethicone crosspolymer ingredients, including this one, safe for use in cosmetics, citing their large molecular weight and minimal skin absorption. The US FDA considers it a skin protector with a good safety profile at low, non-irritating concentrations due to poor absorption. EWG rates common concerns such as cancer, allergies, and developmental/reproductive toxicity as 'LOW'. However, some sources express 'Very Doubtful' concerns due to its ethoxylated nature, mentioning the use of ethylene oxide (a carcinogen) in the ethoxylation process, which might hypothetically compromise skin protection. Specific maximum concentrations for this exact ingredient were not found in CIR reports, though other dimethicone crosspolymers have documented uses up to 7% in face powders and 0.7-3% in rinse-off or leave-on products.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A versatile amphiphilic silicone polymer highly effective in creating a protective, non-greasy film on skin and hair to enhance texture, reduce moisture loss, and provide conditioning benefits, though its ethoxylated nature may be a consideration for certain clean beauty standards.
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