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SELENOMETHIONINE

CAS 3211-76-5
25

Safety score · 0–100

Caution

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

About

Selenomethionine is a cosmetic ingredient. Raw material has significant toxicity. Exercise caution due to limited available safety data.

Selenomethionine is an organic selenium compound where selenium replaces sulfur in methionine. It carries H301 (toxic if swallowed), H331 (toxic if inhaled), H373 (organ effects), and H400/H410 (aquatic toxicity). Selenium compounds have a narrow therapeutic index and the SCCS has set limits for selenium compounds in cosmetics. Use levels must be carefully controlled and the final product must not exceed SCCS-recommended selenium limits.

Skin benefits

  • Selenium is essential trace element
  • Antioxidant cofactor support

Known concerns

  • Acute oral toxicity (H301)
  • Inhalation toxicity (H331)
  • Organ toxicity with repeated exposure (H373)
  • Aquatic toxicity (H400/H410)
  • Narrow safety margin requiring precise dosing
  • SCCS selenium limits apply

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 — always read the physical product label and consult a healthcare professional for personal concerns.