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Moumoujus

DIMETHICONE PEG-8 POLYACRYLATE.

Valuable CAS 217958-64-0 / FILM FORMING, PLASTICISER, SURFACTANT - CLEANSING

Dimethicone PEG-8 Polyacrylate is a multifaceted siloxane polymer engineered to enhance skin texture and hydration. It functions as an effective film-former and plasticizer, creating a smooth, protective barrier that locks in moisture while significantly improving product spreadability and overall skin feel.

Summary

film-forming agent plasticizer emollient cleansing agent moisture barrier

Science

Mechanism of Action

This ingredient operates by forming a flexible film on the skin's surface and acting as a plasticizer, derived from the free radical polymerization of PEG-8 Dimethicone esterified with acrylic acid. Its PEG-8 Dimethicone component serves as an emollient, imparting a desirable silky texture to formulations and improving their application. Concurrently, it establishes a protective barrier that effectively minimizes transepidermal water loss, preventing dehydration and enhancing the skin's tactile quality. Additionally, it exhibits properties as a cleansing agent.

Research

Clinical Evidence

Low confidence
Effective range 1–5%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5.5 – 8.5
0 7 14

Stability

For optimal formulation stability, the functional pH range for its PEG-8 dimethicone component is between 5.5 and 8.5. At 1% active concentration, approximately 20% of PEG-8 dimethicone hydrolyzes in 45 days at pH 5 and in 86 days at pH 8. Stability is enhanced with higher molecular weights (exceeding 10,000) and increased concentrations (from 1% to 5%). It should be incorporated into the water phase of formulations and must not be heated above 50°C (125°F). Alternatively, it can be added to emulsions after the temperature has cooled to 50°C (125°F).

Safety

Safety Profile

CIR Status
Safe as used
Max tested
5.6%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that ingredients within the dimethicone crosspolymer category, including Dimethicone PEG-8 Polyacrylate, are safe under current conditions of use and concentration. Specifically, a concentration range of 0.024% to 5.6% for PEG-8 dimethicone has been determined safe for cosmetic applications. The EWG assesses Dimethicone PEG-8 Polyacrylate with low concerns for cancer, allergies, immunotoxicity, and developmental/reproductive toxicity. However, its safety score may be elevated in inhalable product forms (e.g., sprays, powders) due to potential respiratory concerns, or in cases of contamination by toxic impurities.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Dimethicone PEG-8 Polyacrylate is a valuable ingredient for its ability to form a protective, moisturizing film, enhance skin feel, and provide emollient benefits across all skin types with a low risk of irritation or comedogenicity.

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