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Restricted reducing agent

Hydroxylamine

CAS 7803-49-8
15

Safety score · 0–100

Avoid

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

A small, highly reactive nitrogen compound used as a reducing agent and dye stabilizer. EU rules restrict it to specific hair dye applications with strict concentration limits; it is not safe for general skin use.

Skin benefits

  • Used as a reducing agent and stabilizer in some hair dye formulas
  • Industrial use as antioxidant in chemical manufacturing

Known concerns

  • Severe skin and eye irritant, suspected mutagen
  • Classified as toxic, sensitizer and harmful to aquatic life
  • Strictly restricted in EU cosmetics under Annex III hair dye conditions
  • Free hydroxylamine is not safe for general leave-on skin use

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.