Science
Mechanism of Action
Upon UV light exposure (peaks at 385, 290, 235 nm), it undergoes alpha-cleavage, generating reactive trimethylbenzoyl and diphenylphosphinoyl radicals. These radicals then initiate polymerization, which is crucial for curing products like nail gels.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This oil-soluble ingredient is highly compatible with UV-curable monomers and oligomers. It offers effective curing for thicker layers with reduced oxygen inhibition.
Safety
Safety Profile
The CIR expert panel notes insufficient data for dermal irritation and sensitization at maximum use concentrations on skin. A related photoinitiator, TPO, is a moderate skin sensitizer and will be banned in EU cosmetics from September 2025. This ingredient's permitted use (up to 5%) is primarily in artificial nail systems.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Currently, insufficient data prevents a definitive safety and efficacy assessment for direct use in non-nail skincare applications.
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References
Sources