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DIMETHICONOL/STEARYL METHICONE/PHENYL TRIMETHICONE COPOLYMER.

Valuable / LIGHT STABILIZER, SKIN CONDITIONING

This multifunctional silicone copolymer excels as a film-forming and skin conditioning agent, creating a protective, non-greasy barrier that locks in moisture and improves skin texture. It also serves as a crucial suspending agent and light stabilizer, enhancing formulation integrity and stability.

Summary

Suspending agent Light stabilizer Skin conditioning agent Emollient Film-forming agent Improves gloss and softness Enhances spreadability

Science

Mechanism of Action

DIMETHICONOL/STEARYL METHICONE/PHENYL TRIMETHICONE COPOLYMER functions by forming a hydrophobic, occlusive film on the skin's surface, which effectively reduces transepidermal water loss, thus preventing dehydration and promoting a smoother feel. It concurrently conditions the skin, improving its resilience against external aggressors. Within formulations, it acts as a suspending agent to maintain ingredient dispersion and as a light stabilizer to protect sensitive components from degradation.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH 3 – 10
0 7 14

Stability

Phenyl Trimethicone, a key constituent of this copolymer, demonstrates robust chemical stability across a broad pH range of 3 to 10. This allows for excellent compatibility with diverse cosmetic ingredients, including potent actives such as acids, alkalis, retinol, and vitamin C. The copolymer also works synergistically with other silicones.

Synergies

  • Other silicones
  • Acids
  • Alkalis
  • Retinol
  • Vitamin C

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has determined that Dimethiconol, Methicone, and substituted-methicone polymers, including Stearyl Methicone and Phenyl Trimethicone (components of this copolymer), are safe for use in cosmetic products, provided they are formulated to be non-irritating. These polymers are generally considered to have minimal skin absorption due to their large molecular weight. While a specific maximum concentration for the copolymer was not identified, its constituent Phenyl Trimethicone has reported usage concentrations up to 59.5% in certain hair care products and 24.8% in other makeup preparations.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

This multifunctional silicone copolymer is a valuable ingredient, broadly compatible with all skin types, offering significant skin conditioning, moisture retention, and formulation stability benefits across a wide range of cosmetic products.

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References

Sources