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METHYL PERFLUORO BUTYL/ISOBUTYL ETHER.

Questionable CAS 163702-07-6,163702-08-7 / SOLVENT

Methyl Perfluoro Butyl/Isobutyl Ether is a versatile cosmetic ingredient that functions as an effective emulsifier and gentle solvent. It enhances product texture, providing a silky, non-greasy feel, while also delivering a matte finish and controlling excess oil. The ingredient forms a breathable, moisture-repellent barrier, protecting the skin from environmental elements.

solvent emulsifier viscosity controlling fragrance enhancer foam booster cleansing agent

Science

This ingredient expertly combines water and oil phases, stabilizing cosmetic formulations and improving their application. Its unique fluorinated structure contributes to a pleasant, silky skin feel and a non-greasy finish, while also offering a matte effect by managing surface oil. It creates a subtle, moisture-resistant film that shields the skin from external moisture and impurities, yet ensures skin breathability. Its low viscosity facilitates easy product spreadability and fast drying, making it an effective alternative to alcohol in some formulations and enhancing fragrance delivery.


Research

Insufficient-data confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Both
Optimal pH N/A
0 7 14

Stability

The ingredient exhibits excellent thermal and chemical stability, maintaining its integrity and functionality within emulsion systems due to its robust fluorinated molecular structure.

Conflicts

  • strong oxidizing agents

Safety

CIR Status
Not reviewed
Sensitization risk Low

While generally considered to have a relatively safe usage profile in cosmetics, a closely related isomer (Methyl Perfluorobutyl Ether) is classified as a PFAS and flagged by EWG for concerns including enhanced skin absorption, potential endocrine disruption, persistence, bioaccumulation, and organ system toxicity. This ingredient itself is described as minimally irritating to the skin and practically non-irritating to the eyes, with no significant health hazards under normal use, though individual skin tests are recommended for potential sensitivity.


Your Skin

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

Our Assessment

Questionable

While offering unique textural and functional benefits for formulations and appearing minimally irritating, its classification as a PFAS and the associated concerns with a related isomer make its suitability for Moumoujus precision skincare questionable without further comprehensive safety data specific to this compound.


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