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PEG-4 PEG-12 DIMETHICONE.

Valuable CAS - / EMULSION STABILISING

PEG-4 PEG-12 Dimethicone is a water-soluble silicone copolymer, functioning as a multi-purpose conditioning agent and emulsifier in precision skincare. Its unique structure enhances skin hydration and texture, while also improving product feel and formulation stability.

Summary

Emollient Emulsifying Viscosity Controlling Humectant Hair Conditioning Skin Conditioning

Science

Mechanism of Action

This ingredient's amphiphilic nature, combining hydrophobic silicone with hydrophilic polyethylene glycol chains, enables it to effectively reduce interfacial tension, thereby stabilizing oil-in-water emulsions. When applied to the skin, it forms a lightweight, breathable film that actively attracts and retains moisture, preventing dehydration and imparting a smooth, silky sensation. Furthermore, it improves product spreadability and lubrication. It also contributes as a humectant, emollient, wetting agent, and foam builder.

Research

Clinical Evidence

High confidence
Effective range 0.1–2%
Optimal

N/A

Key findings

  1. 01 Recommended concentration ranges for cosmetic products vary; for skin lotions, an effective range is 0.1-2.0%. Lightweight serums benefit from lower concentrations (e.g., 0.1%), while richer creams can effectively utilize higher percentages within this range. The Cosmetic Ingredient Review (CIR) Expert Panel has deemed it safe for cosmetic use up to a maximum concentration of 6.5%.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5.5 – 7
0 7 14

Stability

This ingredient exhibits robust stability within neutral, mildly acidic, and mildly alkaline aqueous solutions. Its stability may be compromised by exposure to strong acids or alkalis. It is readily soluble and stable in cool water and lower alcohols.

Conflicts

  • Stearyl alcohol
  • Stearic acid
  • IPM (Isopropyl Myristate)
  • Beeswax
  • Glycerol
  • Lanolin
  • Mineral Oil
  • Paraffin wax
  • Dimethicone (350cSt)

Safety

Safety Profile

CIR Status
Safe as used
Max tested
6.5%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel affirmed the safety of PEG-12 Dimethicone (and related PEGs) in cosmetics at concentrations up to 6.5%. However, some databases note a moderate hazard potential due to possible trace contamination by impurities such as ethylene oxide and 1,4-dioxane. It is advised not to use products containing PEGs on broken or irritated skin. Water-soluble forms, like PEG-12 Dimethicone, are generally considered to have a lower environmental impact.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-4 PEG-12 Dimethicone is a versatile and valuable ingredient for cosmetic and skincare formulations, offering excellent conditioning, emulsifying, and moisturizing benefits suitable for all skin types with a low risk of irritation or comedogenicity.

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