[[1,1'-Biphenyl]-4,4'-diyl]diammonium sulphate
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A cosmetic ingredient. Exercise caution due to limited available safety data.
Benzidine-4,4'-diammonium sulfate is an aromatic diamine salt derived from benzidine, a known human carcinogen. While this specific salt may have reduced direct carcinogenicity compared to benzidine itself, the EU Cosmetics Regulation Annex III restricts its use at ≥0.1% in cosmetic products due to concerns related to potential benzidine release. The restriction reflects the precautionary principle regarding aromatic amine carcinogens in consumer products.
Known concerns
- Potential benzidine release concern
- Carcinogen precursor
- Restricted to ≤0.1% in EU cosmetics
References
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.