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Moumoujus

SIMETHICONE.

Valuable CAS 8050-81-5 / ANTIFOAMING, HAIR CONDITIONING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

Simethicone is a versatile silicone polymer primarily known for its surface tension-reducing properties. It functions as an effective antifoaming agent, ensuring smooth product consistency, while simultaneously offering significant skin conditioning and emollient benefits. Its ability to form a protective barrier enhances hydration and imparts a desirable velvety texture.

Summary

Emollient Antifoaming Skin Conditioning Hair Conditioning Protective Barrier Formation Moisture Retention Surface Tension Reduction

Science

Mechanism of Action

Simethicone operates by leveraging its polydimethylsiloxane component and silica gel to reduce surface tension. When applied to the skin, it forms a lightweight, non-occlusive protective film that effectively minimizes transepidermal water loss, leading to increased hydration and a notably smooth skin feel. In cosmetic formulations, this mechanism prevents the formation of unwanted bubbles and foam, ensuring a consistent and pleasant product experience. Additionally, it aids in improving the spreadability of other ingredients, such as mineral sunscreens, by uniformly coating their particles.

Research

Clinical Evidence

Medium confidence
Effective range N/A
Optimal

2%

Key findings

  1. 01 Observed as an emollient, antifoaming, and skin conditioning agent within a general moisturizer (Derma Factory Houttuynia Cordata 71% Cream), illustrating its practical utility in cosmetic formulations.

Transparency

Dusting Analysis

Not commonly dusted

Information regarding dusting behavior or specific dusting thresholds for Simethicone was not available in the provided research data.

The Formula

Formulation

Solubility
Oil
Optimal pH 3 – 10
0 7 14

Stability

Simethicone maintains optimal stability within a pH range of 3 to 10. Exposure to highly acidic conditions (below pH 3) or highly alkaline conditions (above pH 10) can lead to the degradation of siloxane bonds through hydrolysis.

Synergies

  • Improves the spreadability and ease of formulation for inorganic sunscreen ingredients, such as titanium dioxide, by providing a uniform coating.

Conflicts

  • Strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
30%
Sensitization risk Low

The CIR Expert Panel concluded that the broader 'Methicone ingredient family,' which encompasses dimethicone (a primary component of simethicone), is 'safe for use in cosmetics' with a 'safe as used' conclusion issued in February 2000. Simethicone exhibits a favorable safety profile for both hair and skin, with allergic reactions being rare when used within recommended concentrations. While the FDA has proposed classifying Dimethicone as Category I (safe and effective) for topical skin protectants up to 30%, it notes 'inadequate data' for establishing general recognition of the safety and effectiveness of simethicone specifically in skin protectant drug products under certain regulations (21 CFR 310.545(a)(18)), a distinction from its well-established cosmetic use.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Simethicone is a valuable silicone-based ingredient, highly effective as an emollient and antifoaming agent, offering excellent skin conditioning with a strong safety profile and broad skin compatibility across all skin types.

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