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Banned Substance

Benzidine sulphate

CAS 21136-70-9 Updated
1

Safety score · 0–100

Avoid

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

About

Benzidine sulphate is a salt of benzidine, an IARC Group 1 known human bladder carcinogen. Banned in EU cosmetics under Annex II.

Skin benefits

  • Used historically in dye synthesis and analytical chemistry

Known concerns

  • EU Annex II banned in cosmetics
  • Benzidine — IARC Group 1 known human carcinogen
  • Bladder cancer cause
  • CLP Carc 1A

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.