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PERFLUOROHEXANE.

Questionable CAS 355-42-0 / SOLVENT

Perfluorohexane is a synthetic fluorocarbon primarily utilized in skincare formulations as a solvent and texture enhancer. While it is marketed for its high capacity to absorb atmospheric oxygen, this mechanism may concurrently increase detrimental reactive oxygen species (ROS) in the skin. Its classification within the PFAS group and the absence of proven skin benefits warrant careful consideration for its inclusion.

solvent texture-enhancing

Science

This fluorocarbon acts as an effective solvent, dissolving other ingredients, and contributes to desirable product textures. It is noted for its ability to absorb oxygen from the air at high concentrations, leading to claims of enhanced oxygen delivery to the skin, often as part of 'Fiflow' blends. However, this mechanism simultaneously poses a risk of elevating the presence of reactive oxygen species (ROS), which could potentially accelerate skin aging.


Research

Low confidence
Effective range 0.9–14.25%
Optimal

N/A


Transparency

Commonly dusted

Perfluorohexane is often included for its solvent and texture-enhancing properties, and is sometimes marketed for 'oxygen delivery' claims. However, without concrete clinical evidence for skin benefits and with the potential for adverse effects like increased reactive oxygen species, its presence in formulations may primarily serve cosmetic rather than therapeutic functions, suggesting it could be 'dusted' in formulations that claim active benefits from its inclusion.


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Perfluorohexane is generally considered stable under recommended storage conditions. Information regarding an optimal pH range for stability is not readily available. It is unstable in the presence of incompatible materials, though specific incompatibilities are not widely listed.


Safety

CIR Status
Not reviewed
Max tested
14.25%
Sensitization risk Low

The FDA considered Perfluorohexane to pose low safety concerns in cosmetic products under intended use conditions but emphasized the critical need for further research into toxicological profiles of PFAS in cosmetics, the extent of skin absorption, and overall human health risks. While a human 3D epidermal model showed 108% cell viability, indicating low skin irritation potential, some hazard warnings exist. A primary concern remains its potential to generate reactive oxygen species (ROS) within the skin, which could be detrimental to skin health, alongside its classification as a PFAS, a group of chemicals with growing regulatory scrutiny.


Your Skin

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

Our Assessment

Questionable

Despite its role as a solvent and texture enhancer with low immediate irritancy, the lack of demonstrated skin benefits, potential for generating skin-damaging reactive oxygen species, and its association with PFAS make Perfluorohexane a questionable ingredient for long-term skin health.


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