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C9-15 FLUOROALCOHOL PHOSPHATE.

Questionable CAS 223239-92-7 / SKIN CONDITIONING

A high-performance fluorinated ester primarily used as a surface treatment for cosmetic pigments and fillers. It creates a specialized barrier that repels both water and oil, ensuring makeup remains color-true and stable even in high-sebum or humid conditions.

Pigment Coating Skin Conditioning Hydrophobic Agent Oleophobic Agent

Science

It functions by coating particles with a low-surface-energy layer that exhibits dual hydrophobicity and oleophobicity. This prevents skin oils and sweat from wetting the pigments, which effectively stops the 'creeping' effect and oxidative darkening often seen in long-wear formulations.


Research

High confidence
Effective range 1–5%
Optimal

3%

Key findings

  1. 01 Demonstrated superior resistance to makeup color shifting and migration compared to standard silicone (methicone) coatings when utilized at a 3% concentration.
  2. 02 Facilitates the stable delivery of active powders into emulsion systems, enhancing skin adhesion and providing a weightless, silky finish.

Transparency

Not commonly dusted
Min. effective
0.5%
Red flag below
0.1%

While used at low levels as a coating, concentrations below 0.5% in color cosmetics may not provide the full 'sebum-proof' benefits advertised. In active treatments, it is rarely dusted but rather used functionally for texture transformation.


The Formula

Solubility
Both
Optimal pH 3 – 12
0 7 14

Stability

Possesses extreme thermal and chemical stability due to robust carbon-fluorine bonds. Compatible with anhydrous and water-in-oil systems.

Synergies

  • Titanium Dioxide
  • Iron Oxides
  • Magnesium Ascorbyl Phosphate

Conflicts

  • Cationic surfactants
  • Extremely low pH environments

Safety

CIR Status
Not reviewed
Max tested
0.6%
Sensitization risk Low

As a member of the PFAS family, this ingredient faces increasing regulatory scrutiny in the EU and Canada due to environmental persistence and potential degradation into PFOA. Current safety monitoring focus is on environmental impact rather than immediate skin toxicity.


Your Skin

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

Our Assessment

Questionable

While technically superior for long-wear performance and sebum resistance, its status as a persistent PFAS makes it a candidate for replacement by more eco-friendly alternatives.


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