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PPG-25 DIMETHICONE.

Valuable CAS 68957-00-6 / HAIR CONDITIONING, SKIN CONDITIONING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

PPG-25 Dimethicone is a specialized amphiphilic silicone polymer functioning as both a skin conditioning agent and an effective emulsifier. It creates a breathable, protective film on the skin, aiding barrier integrity, and expertly stabilizes immiscible oil and water phases within cosmetic formulations.

Summary

Emulsifying Skin Conditioning Hair Conditioning Film Forming Surfactant Humectant Solubilizer Consistency Enhancer Softening Agent

Science

Mechanism of Action

This ingredient functions by forming a vapor-permeable film on the skin's surface, which helps to minimize transepidermal water loss and protect against exogenous substances. As an amphiphilic emulsifying surfactant, it significantly reduces surface tension, enabling the stable and homogeneous blending of oil and water components within a product. It also contributes to a smoother skin feel and a subtle shine.

Research

Clinical Evidence

Medium confidence
Effective range 2–5%
Optimal

N/A

Key findings

  1. 01 Studies on related PEG Dimethicone demonstrate efficacy at 2% for improved hair conditioning, foam quality, and wet/dry combability in shampoos.
  2. 02 General research on silicone polymers indicates that concentrations less than 5% can significantly enhance consumer perception in personal care formulations.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH 5.5 – 8.5
0 7 14

Stability

Its amphiphilic nature, containing both water-soluble (PPG) and silicone-soluble (dimethicone) groups, enables effective blending of oil and water phases. A functional pH range of 5.5-8.5 is recommended for stable formulations. It is easily integrated into water-based products and compatible with anionic surfactants.

Synergies

  • Compatible with anionic surfactants for enhanced stability in cleansing formulations.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
15%
Sensitization risk Low

The CIR Expert Panel concluded that PPG-25 Dimethicone and related siloxane polymers are safe for cosmetic use, primarily due to their large molecular weights and minimal skin absorption. The FDA also considers dimethicone a skin protector with a good safety profile at low concentrations. Trace impurities, such as cyclotetrasiloxane (<1%) and cyclopentasiloxane (<0.5%), may be present within acceptable limits. EWG rates allergy and immunotoxicity concerns as 'LOW'.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PPG-25 Dimethicone is a valuable multifunctional ingredient, offering effective skin conditioning and robust formulation stabilization with an excellent safety and compatibility profile across all skin types.

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