UV Filter
METHOXYCINNAMIDOPROPYL POLYSILSESQUIOXANE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A polysilsesquioxane polymer carrying methoxycinnamate UV-absorber groups. Polymer-bound form reduces skin absorption.
Methoxycinnamidopropyl polysilsesquioxane is a silicone-network (silsesquioxane) polymer functionalised with 4-methoxycinnamate UV-absorbing groups linked via a propyl amide spacer. The approach tethers the cinnamate chromophore to a large polymer backbone, reducing skin permeation compared with small-molecule methoxycinnamates (e.g. ethylhexyl methoxycinnamate), which have drawn scrutiny for potential endocrine effects in animal studies. EU CosIng lists related polymeric UV filters; this specific INCI is newer and does not yet appear in Annex VI. No independent CIR/SCCS review. Evidence is low; scoring reflects the design rationale balanced against thin public data.
Function
Skin benefits
- Polymer-bound cinnamate UV filter
- Lower skin penetration than free cinnamates
- Water- and photo-stable
Known concerns
- Methoxycinnamate UV filters have potential endocrine-disruption concerns (free molecule)
- Limited independent long-term safety data for polymer form
- Not yet widely regulator-reviewed
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related uv filters
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.