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PHENYL PROPYL TRIMETHICONE.

Valuable / HAIR CONDITIONING, SKIN CONDITIONING

Phenyl Propyl Trimethicone is a phenyl-substituted silicone polymer, prized for its ability to enhance the sensory feel and performance of skincare and cosmetic formulations. It functions as an emollient and film-former, contributing to a smooth, non-greasy finish on the skin. Its beneficial properties are largely understood through research on closely related methicones.

Summary

emollient skin conditioning hair conditioning antifoaming water repellent gloss enhancer reduces tackiness

Science

Mechanism of Action

As a member of the phenyl-substituted methicone family, Phenyl Propyl Trimethicone is theorized to establish a fine, breathable, and non-tacky film upon the skin's surface. This polymeric layer acts as a conditioning agent, effectively mitigating transepidermal water loss to support optimal skin hydration and maintain a soft texture. The flexible siloxane backbone imparts emollient characteristics and ensures gas permeability, while the phenyl group enhances gloss due to its higher refractive index. Furthermore, it improves the spreadability and overall texture of cosmetic formulations.

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

Based on data for the related ingredient Phenyl Trimethicone, Phenyl Propyl Trimethicone is expected to exhibit excellent stability across a broad pH spectrum, specifically maintaining its integrity within a range of pH 3 to 10. It also demonstrates high thermal stability, tolerating temperatures up to 250°C without degradation, and effectively resists oxidation.

Safety

Safety Profile

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

The CIR Expert Panel has concluded that phenyl-substituted methicones, which include Phenyl Propyl Trimethicone, along with Phenyl Trimethicone and Diphenylsiloxy Phenyl/Propyl Trimethicone, are safe for use in cosmetic products at current concentrations and practices. A notable exception is for products where incidental inhalation may occur, as data for this specific exposure route remains insufficient. For the related Phenyl Trimethicone, the highest reported maximum concentration of use in leave-on makeup preparations is 24.8%, and up to 59.5% in non-coloring shampoos. This ingredient is generally recognized as safe for cosmetic use by major regulatory bodies like the FDA and in the EU.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Phenyl Propyl Trimethicone is a valuable silicone for enhancing cosmetic formulations, offering emollient, film-forming, and texture-improving benefits with a low potential for irritation and comedogenicity across all skin types, based on data from closely related compounds.

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