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Cationic surfactant/hair conditioner

C16-alkyltrimethylammonium chloride C18-alkyltrimethyammonium chloride

CAS 112-02-7
65

Safety score · 0–100

Fine

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

Cetrimonium and steartrimonium chloride are cationic surfactants used to condition hair and skin. Safe within EU concentration limits but can irritate at higher levels in leave-on products.

Skin benefits

  • Cationic conditioning agent for hair products
  • Antistatic and detangling action
  • Effective antimicrobial preservation booster

Known concerns

  • Cationic surfactants can be eye and skin irritants at high concentrations
  • Rinse-off use recommended; restricted in leave-on by EU
  • Quaternary ammonium compounds carry environmental persistence concerns
  • Concentration limits apply under EU Annex III

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, so always read the physical product label and consult a healthcare professional for personal concerns.