3,3'-Dichlorobenzidine

5

Avoid

CAS Number: 91-94-1

About 3,3'-Dichlorobenzidine

3,3'-dichlorobenzidine is a cosmetic ingredient. Exercise caution due to limited available safety data.

Detailed Analysis

3,3'-Dichlorobenzidine (3,3'-DCB) is an aromatic amine intermediate used in azo dye and pigment manufacture. It is classified by IARC as Group 2B (possibly carcinogenic to humans) and EU CLP as H312 (harmful in contact with skin), H317 (skin sensitization), H350 (carcinogen), H400/H410 (aquatic toxicity), H335 (respiratory irritation), and H341/H351 (mutagenicity/carcinogen suspected). EU SVHC identification applies. The EU Cosmetics Regulation Annex II prohibits 3,3'-dichlorobenzidine in cosmetic products.

Known Concerns

  • ⚠ Suspected carcinogen H350
  • ⚠ Skin sensitizer H317
  • ⚠ Mutagenicity H341
  • ⚠ Environmental hazard H400/H410
  • ⚠ SVHC substance
  • ⚠ Banned in EU cosmetics (Annex II)

Safety Score

5

Avoid

Based on EU regulatory data, published safety research, and ingredient function analysis.

References

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EU CosIng Database

European Commission cosmetic ingredient registry

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This information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.