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Preservative

3-Iodo-2-propynylbutylcarbamate

CAS 55406-53-6
30

Safety score · 0–100

Caution

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

IPBC — an iodopropynyl carbamate preservative. Effective antifungal but the EU restricts it: not allowed in lip, oral, or under-3 products and capped at low %.

Skin benefits

  • Antifungal preservative
  • Effective at low %
  • Broad-spectrum support

Known concerns

  • EU Annex V strict use limits
  • Skin sensitiser
  • Iodine release / thyroid signal

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.