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Restricted halogenated preservative

Dichlorophen

CAS 97-23-4
18

Safety score · 0–100

Avoid

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

Dichlorophen is a halogenated phenol antimicrobial historically used as a cosmetic preservative. It is a known contact allergen with endocrine and environmental concerns, and modern formulas generally avoid it.

Skin benefits

  • Historically used as an antimicrobial and antifungal agent
  • Effective against a broad spectrum of organisms in industrial settings
  • Was previously permitted as a preservative in cosmetics at low levels

Known concerns

  • Strong contact allergen with documented sensitization cases
  • Restricted to 0.5% as a preservative under EU Annex V and increasingly avoided
  • Suspected endocrine and aquatic toxicity concerns
  • Banned for use in many regional cosmetic markets outright
  • Halogenated phenol structure linked to environmental persistence

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.