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Preservative

POLYLYSINE HBR

CAS 25988-63-0 Updated
82

Safety score · 0–100

Good

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

About

Epsilon-polylysine hydrobromide — a natural fermentation-derived peptide preservative with broad antimicrobial action. GRAS-rated in food, considered safe and biodegradable in cosmetics.

Function

HAIR CONDITIONING

Skin benefits

  • Natural broad-spectrum antimicrobial preservative
  • Biodegradable
  • GRAS in food and cosmetic uses

Known concerns

  • Cationic — may interact with anionic surfactants
  • Limited long-term cosmetic data on HBr salt
  • Possible mild irritation at high %

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.