Colorant
Sulfonated nigrosine color
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A complex blue-black dye made by reacting aniline with nitrobenzene, then sulfonated. Mostly an industrial/biological stain; cosmetic safety data is thin and it is not on the EU positive colorant list.
Skin benefits
- Deep blue-black colorant for industrial and limited cosmetic applications
- Sulfonation improves water solubility
- Long-established as a textile/biological stain
Known concerns
- Complex undefined mixture from aniline-class precursors
- Aromatic-amine-derived; sensitization and impurity concerns
- Limited cosmetic-specific safety data; not on positive EU colorant list
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related colorants
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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.