The Lab
Specimen No. 0029
CautionSyntheticantimicrobialsurfactant

Cetrimonium Chloride

cetrimonium chloride · ctac · cetyltrimethylammonium chloride

Quaternary ammonium salt used as a conditioning agent and preservative. At cosmetic concentrations it is generally safe, but has cytotoxic potential at higher doses.

medium confidence
Researched April 18, 2026

Concerns

  • Cytotoxic at high concentrations — damages cell membranes
  • Skin sensitization possible in individuals with sensitive skin
  • Antimicrobial — may disrupt skin microbiome with frequent use
  • Environmental toxicity to aquatic organisms

Commonly found in

ConditionerLeave-in hair treatmentStyling productSkin toner

Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.

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