UV filter ingredient
Ethylhexyl Methoxycrylene
A UVA-absorbing photostabilizer (Hallstar SolaStay S1) that prevents degradation of avobenzone and other UV filters via singlet-state quenching; listed in EU CosIng (ref 87035) as a photostabilizer but not as an Annex VI approved UV filter.
Also known as: SolaStay S1
photostabilizeruva-filteruv-filter
Benefits
- ✓Highly effective photostabilizer for avobenzone (butyl methoxydibenzoylmethane) via singlet-state quenching
- ✓Also photostabilizes octinoxate and retinoids (retinol, retinyl palmitate, cholecalciferol)
- ✓Absorbs in the UVA region; outperforms octocrylene as an avobenzone stabilizer
- ✓Excellent solvent for crystalline UV filters
Watch for
- ⚠Not listed as an approved UV filter in EU Annex VI — classified as a photostabilizer/excipient, not a primary filter
- ⚠Not FDA-approved as an OTC sunscreen active
- ⚠Regulatory status as a standalone UV claim ingredient is unclear
