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FERROUS SULFATE

CAS 7720-78-7
55

Safety score · 0–100

Moderate

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

An iron(II) salt used in trace amounts in some hair products. Skin and eye irritant per GHS, with acute oral toxicity if ingested — kept at very low percentages.

Function

ASTRINGENT

Skin benefits

  • Iron source for some haircare formulas
  • Used in trace amounts
  • Stable inorganic salt

Known concerns

  • GHS skin and eye irritant
  • Acute oral toxicity if ingested
  • Can stain skin and fabric
  • Pro-oxidant effects in formulations

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.