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BENZIMIDAZOLE

CAS 51-17-2
45

Safety score · 0–100

Moderate

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

About

A heterocyclic compound used in various applications including as a preservative and antifungal agent, with some regulatory concerns about its safety profile.

Benzimidazole (CAS 51-17-2, PubChem CID 5798) is a heterocyclic compound with antifungal and preservative properties. Its safety score of 45 in PubChem reflects moderate concerns. It is not listed in EU Annexes II or III under Regulation (EC) 1223/2009, meaning it is not explicitly banned or restricted as a cosmetic ingredient. However, its heterocyclic structure raises concerns about potential sensitisation and its suitability for long-term skin contact applications. The SCCS has noted data gaps in the safety assessment.

Skin benefits

  • Antifungal properties
  • Preservative function

Known concerns

  • Limited safety data for cosmetic use
  • Potential sensitisation concern

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.