Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle
Moumoujus

PHENYL TRIMETHICONE.

Valuable CAS 2116-84-9 / ANTIFOAMING, HAIR CONDITIONING, SKIN CONDITIONING

Phenyl Trimethicone is a versatile silicone known for creating a smooth, non-greasy feel on the skin. It forms a breathable, hydrophobic film that helps to refine skin texture, minimize the appearance of imperfections, and lock in essential moisture without pore occlusion.

Summary

Emollient Skin Conditioning Smoothing Agent Water Resistance Enhancer Shine Enhancer Hair Conditioning Antifoaming

Science

Mechanism of Action

This ingredient operates by forming an exceptionally thin, hydrophobic film on the skin's surface. This film effectively fills microscopic irregularities, resulting in a polished and uniform skin texture. Concurrently, it acts as a superior emollient, delivering a non-oily, silky tactile experience and enhancing product spreadability due to its inherently low surface tension. The resultant barrier not only aids in retaining hydration and preventing moisture loss but also confers water-resistance to formulations without compromising breathability. Its high refractive index further contributes to a desirable glossy finish and improved luminosity.

Research

Clinical Evidence

High confidence
Effective range 2.5–24.8%
Optimal

Not precisely defined for specific clinical outcomes, but demonstrates efficacy and is well-tolerated across a broad range, with functional benefits observed from 2.5% up to 24.8% in leave-on applications.

Key findings

  1. 01 A moisturizer containing 2.5% Phenyl Trimethicone exhibited a cumulative irritation score of 13 (out of a maximum of 630) in a 9-subject study, classifying it as a mild material.
  2. 02 Undiluted Phenyl Trimethicone was found to be non-irritating and non-sensitizing in a Human Repeated Insult Patch Test (HRIPT) involving 50 subjects.
  3. 03 No irritation or sensitization was observed in modified Draize-Shelanski HRIPTs for a cosmetic foundation containing 5% Phenyl Trimethicone (189 subjects) or a moisturizer with 2.5% Phenyl Trimethicone (239 subjects).
  4. 04 Seventeen distinct cosmetic products, each formulated with 10% Phenyl Trimethicone, were deemed minimally irritating, with the highest total irritancy score recorded as 5 out of 256.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH 3 – 10
0 7 14

Stability

Phenyl Trimethicone maintains chemical integrity within a pH range of 3 to 10. It boasts exceptional thermal stability, resisting degradation up to 250°C (with degradation onset above 270°C), and is highly resistant to oxidation.

Synergies

  • Organic materials
  • Other silicones
  • Emollients
  • Humectants
  • Ethanol (up to 95%)

Safety

Safety Profile

CIR Status
Safe as used
Max tested
24.8%
Sensitization risk Low

The Expert Panel for Cosmetic Ingredient Safety (CIR) concluded Phenyl Trimethicone is safe for cosmetic use within current practices and concentrations, with an exception for products that might be incidentally inhaled due to insufficient data. It holds approvals from the FDA and EU for regular use and is considered non-toxic. The highest reported maximum concentration for leave-on formulations is 24.8%, while for non-coloring shampoos (rinse-off) it is 59.5%.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Phenyl Trimethicone is a valuable silicone ingredient, highly rated for its ability to impart a smooth, non-greasy texture, enhance product spreadability, and provide safe, effective skin conditioning across all skin types.

Related

Similar Ingredients

Finding similar ingredients…