4-Nitrosophenol
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A nitrosophenol compound of significant concern due to its nitroso group, raising genotoxicity and nitrosamine formation potential in cosmetic formulations.
4-Nitrosophenol contains both a phenolic hydroxyl group and a nitroso group at the para position, creating a compound of significant toxicological concern. The nitroso moiety raises concerns about nitrosamine formation, a class of compounds known to be carcinogenic. Under EU Regulation 1223/2009, this ingredient lacks authorization and would be considered prohibited due to the absence of a safety assessment supporting its use in cosmetics.
Known concerns
- Potential for nitrosamine formation - carcinogenic concern
- Not authorized in EU cosmetics
- Genotoxic potential
- Absence of safety data for cosmetic use
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 — always read the physical product label and consult a healthcare professional for personal concerns.