[3,3'-Dimethyl[1,1'-biphenyl]-4,4'-diyl]diammonium bis(hydrogen sulphate)

22

Avoid

CAS Number: 64969-36-4

About [3,3'-Dimethyl[1,1'-biphenyl]-4,4'-diyl]diammonium bis(hydrogen sulphate)

A biphenyl-based cationic dye bearing structural alerts for carcinogenicity (azo bond + diamine) and classified as H350 suspected carcinogen.

Detailed Analysis

This biphenyldiammonium sulfate is not listed in EU CosIng Annexes, indicating no approved cosmetic use. Its H350 (suspected carcinogen) and H411 (aquatic chronic toxicity) classifications are consistent with azo dye chemistry. The o-tolidine backbone is a known carcinogenic precursor in azo colorants, and the compound is structurally related to banned benzidine-based dyes. Its use in cosmetics is contraindicated under EU Regulation 1223/2009.

Known Concerns

  • ⚠ H350 suspected carcinogen
  • ⚠ Not listed in EU CosIng
  • ⚠ Related to banned benzidine dyes
  • ⚠ Aquatic toxicity H411

Safety Score

22

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.