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PEG-8 CETYL DIMETHICONE.

Valuable / SKIN CONDITIONING

PEG-8 Cetyl Dimethicone is a versatile silicone polymer that acts as a skin conditioning agent and emollient. It forms a lightweight, breathable film on the skin to enhance hydration and provide a silky texture, while also functioning as an effective oil-in-water emulsifier.

Summary

Skin conditioning agent Emollient Humectant Emulsifier

Science

Mechanism of Action

This ingredient operates by forming a protective, vapor-permeable film across the skin's surface, effectively minimizing transepidermal water loss and thereby locking in moisture. This action results in enhanced skin hydration and a softened feel. Its amphiphilic structure, combining silicone and PEG components, also allows it to improve product spreadability, reduce tackiness, and stabilize oil-in-water emulsions.

Research

Clinical Evidence

Low confidence
Effective range N/A
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 stable formulations, PEG-8 Cetyl Dimethicone should be incorporated within a pH range of 5.5 to 8.5. It is best added to the water phase. If hot processing, ensure the temperature drops below 50°C (122°F) before addition; do not exceed 50°C (125°F). Stability may be enhanced with decreased water solubility, increased molecular weight (>10,000), and higher concentrations (1% to 5%) for related ingredients.

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 Cetyl PEG-8 Dimethicone is safe for use in cosmetics under current practices and concentrations. For the related PEG-8 Dimethicone, the CIR deemed concentrations from 0.024% to 5.6% safe. Potential contaminants such as Cyclopentasiloxane, Cyclotetrasiloxane, Ethylene Oxide, and 1,4-Dioxane may be a concern. A closely related compound, Bis-cetyl/PEG-8 cetyl PEG-8 dimethicone, showed dermal irritation at 100% concentration in a rabbit study, but PEG-8 Cetyl Dimethicone is generally well-tolerated in typical cosmetic concentrations. PEG-related compounds are largely recognized as safe for limited food use by the FDA.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-8 Cetyl Dimethicone is a versatile and well-tolerated emollient and conditioning agent, enhancing skin hydration, texture, and product spreadability, making it a valuable asset in a wide array of formulations.

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