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Thickener

POLYSILICONE-21

CAS 1013922-83-2 Updated
82

Safety score · 0–100

Good

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

About

A silicone-elastomer thickener that gives products a soft-focus, powdery finish. Inert, non-reactive, well-tolerated; very high molecular weight limits skin penetration.

Function

VISCOSITY CONTROLLING

Skin benefits

  • Thickens silicone-based formulations
  • Soft-focus optical effect
  • Lightweight, powdery feel
  • Non-irritating elastomer

Known concerns

  • Not readily biodegradable
  • Heavy MW silicone class

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.