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BENZALKONIUM CETYL PHOSPHATE

50

Safety score · 0–100

Moderate

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

About

A quaternary ammonium compound combined with a phosphate ester that functions as an antimicrobial preservative and emulsifying agent, but raises concerns due to preservative and sensitisation potential.

Benzalkonium Cetyl Phosphate is a complex formed from benzalkonium chloride (a quaternary ammonium compound, QAC) and cetyl dihydrogen phosphate. Benzalkonium compounds have been subject to increasing safety scrutiny in the EU, with the SCCS noting concerns about potential sensitisation, respiratory effects from inhalation, and cytotoxicity at high concentrations. The substance carries a PubChem safety score of 50, reflecting these concerns. QAC preservatives are limited in certain jurisdictions and should be used at the minimum effective concentration.

Skin benefits

  • Antimicrobial preservation
  • Emulsifying function

Known concerns

  • Benzalkonium component raises sensitisation concerns
  • QAC preservatives under EU safety review
  • Eye irritation potential
  • Inhalation concerns in spray formulations

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.