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SILICA STEARDIMONIUMPROPYL SILYLATE

82

Safety score · 0–100

Good

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

A surface-modified silica designed to conditioning hair and skin while providing a smooth, soft-feel aesthetic in cosmetic formulations.

This ingredient is a functionalised silica produced by reacting a quaternary ammonium silane with fumed silica. Silica itself is authorised without restriction in cosmetic products under EU Regulation 1223/2009. The steardimoniumpropyl silylate modification enhances substantivity to skin and hair, and does not introduce additional EU regulatory concerns at typical use concentrations.

Skin benefits

  • Provides smooth, silky skin feel
  • May help with oil absorption and mattifying effect

Known concerns

  • Inhalation risk if used in powder formulations (respiratory irritant)
  • Nanoparticle form may require additional assessment under EU nanotechnology guidance

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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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.