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Moumoujus

PERFLUORONONYLETHYL CARBOXYDECYL LAURYL DIMETHICONE.

Avoid / SKIN CONDITIONING

Perfluorononylethyl Carboxydecyl Lauryl Dimethicone is a fluorinated silicone utilized for its advanced skin conditioning and sophisticated sensorial properties. It forms a remarkably hydrophobic, 'breathable film' on the skin that enhances barrier function while contributing to an elegant product feel and improved pigment dispersion.

Summary

Skin conditioning Emulsifying Film forming Pigment dispersant Absorbent Bulking agent Emollient Slip modifier Nonaqueous viscosity increasing agent

Science

Mechanism of Action

This ingredient functions by creating a highly water-resistant, yet permeable, film on the skin's surface. This fluorinated silicone structure is designed to be wash-off resistant, effectively assisting in maintaining skin hydration by minimizing transepidermal water loss without imparting an occlusive sensation. Furthermore, similar to other dimethicone crosspolymers, it can act as an absorbent, bulking agent, emollient, and a nonaqueous viscosity increasing agent. A key functional aspect is its efficacy in pigment wetting, which ensures uniform distribution of particulate components such as mineral UV filters or color pigments, thereby enhancing product performance, including UV protection and minimizing the undesired white cast in makeup formulations.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Commonly dusted

While primarily an oil-soluble liquid, the Cosmetic Ingredient Review (CIR) Expert Panel has noted insufficient data to definitively determine the safety of related dimethicone crosspolymer ingredients when incidentally inhaled, particularly in applications like airbrush devices. This raises a potential inhalation concern if the ingredient can become aerosolized or airborne during application.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Safety

Safety Profile

CIR Status
Safe with restrictions (for broader dimethicone crosspolymer category)
Sensitization risk Unknown

Critically, Perfluorononylethyl Carboxydecyl Lauryl Dimethicone is identified as a Per- and Polyfluoroalkyl Substance (PFAS). The European Union has prohibited the use of very similar PFAS ingredients, specifically PERFLUORONONYLETHYL CARBOXYDECYL PEG-10 DIMETHICONE and the broader 'Perfluorononyl Dimethicone' category, due to their classification as persistent organic pollutants (POPs) or very persistent, very bioaccumulative, and toxic (PBT/vPvB) substances under the Stockholm Convention on POPs and REACH regulation. In the United States, there are currently no federal regulations specifically addressing PFAS in cosmetic products. However, the FDA has acknowledged significant data gaps regarding use levels, dermal/oral absorption, mechanistic information, and dermal toxicity for PFAS ingredients in cosmetics, and continues to monitor emerging data. Several U.S. states have independently banned or proposed bans on PFAS in cosmetic and other product categories. The CIR Expert Panel, while generally concluding that broader dimethicone crosspolymer ingredients are safe as used if non-irritating, lacks sufficient data to assess the safety of incidental inhalation for such ingredients in airbrush applications.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Avoid

Despite its functional benefits, this ingredient's classification as a PFAS and associated severe environmental and safety concerns, including existing EU bans on similar substances, render it unsuitable for use in Moumoujus formulations.

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