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DIPHENYLSILOXY PHENYL TRIMETHICONE.

Valuable / ANTIFOAMING, HAIR CONDITIONING, SKIN CONDITIONING

A sophisticated silicone polymer, Diphenylsiloxy Phenyl Trimethicone functions as a protective film former and an effective emollient. It significantly enhances skin hydration, refines product texture, and imparts a subtle, luminous glow by expertly reflecting light.

Summary

Skin Conditioning Hair Conditioning Antifoaming Film Former Emollient Texture Enhancer Light Reflector

Science

Mechanism of Action

As a silicone polymer, Diphenylsiloxy Phenyl Trimethicone establishes a breathable, protective film on the skin's surface, which effectively minimizes transepidermal water loss and significantly boosts skin hydration. Its unique molecular structure contributes to superior product spreadability and imparts a luxurious, cushioned skin feel. Possessing a high refractive index, it skillfully reflects light, optically smoothing skin texture and delivering a radiant, gently glowing complexion. Beyond these benefits, it also assists in wetting and dispersing pigments and UV filters, reduces product tackiness, and enhances water resistance in long-wear formulations.

Research

Clinical Evidence

High confidence
Effective range 0.5–19.9%
Optimal

N/A

Key findings

  1. 01 Human Repeat Insult Patch Tests (HRIPT) at 0.5% and 11% demonstrated no irritation or sensitization, even in sensitive applications like lip balms.
  2. 02 An Ames test confirmed no genotoxicity for concentrations up to 5000 µg/plate.

Transparency

Dusting Analysis

Not commonly dusted

As a liquid silicone polymer, Diphenylsiloxy Phenyl Trimethicone is not susceptible to 'dusting' or airborne inhalation in typical dermal applications.

The Formula

Formulation

Solubility
Oil
Optimal pH 3.5 – 7.5
0 7 14

Stability

This ingredient presents as a colorless, transparent liquid with minimal odor, exhibiting excellent thermal stability. It is highly compatible with a broad range of silicones, esters, cosmetic oils, and UV filters, allowing for seamless integration. Its resistance to oxidation and ease of emulsification with standard agents make it a robust formulation component. It blends uniformly with oils, waxes, pigments, and active ingredients like retinol and niacinamide, ensuring consistent distribution and enhanced stability. It is heat tolerant and typically incorporated into the silicone phase of a formulation.

Synergies

  • Silicones
  • Esters
  • Cosmetic oils
  • UV filters
  • Waxes
  • Pigments
  • Retinol
  • Niacinamide

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
19.9%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Diphenylsiloxy Phenyl Trimethicone is safe for use in cosmetics under current practices and concentrations, with a maximum reported concentration of 19.9% in eyeliners. A key restriction notes insufficient data to determine safety for products that may be incidentally inhaled. Human studies at concentrations up to 11% confirmed no irritation or sensitization. While neat application showed slight, reversible irritation in rabbit skin and eyes, it is not classified as an irritant by the Globally Harmonized System (GHS).

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

This versatile silicone polymer is a valuable asset for enhancing skin hydration, refining product aesthetics, and imparting a luminous finish across a wide range of cosmetic formulations, supported by strong safety data within recommended concentrations.

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