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Colorant

Sodium tris(1,2-naphthoquinone 1-oximato-O,O')ferrate(1-)

CAS 16143-80-9
25

Safety score · 0–100

Caution

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A sodium iron-naphthoquinone-oxime complex used historically as a hair colorant. EU significantly restricts its cosmetic use due to genotoxicity flags from naphthoquinone class. Avoid where possible.

Skin benefits

  • Historical hair colorant only

Known concerns

  • EU significantly restricts in cosmetics
  • Iron-naphthoquinone complex with sensitization concerns
  • Aromatic amine and naphthoquinone genotoxicity flags

References

EU

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.