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Banned Substance

sulfamethoxazole

CAS 723-46-6
4

Safety score · 0–100

Avoid

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

A prescription sulfonamide antibiotic. Listed in EU Annex II — prohibited in cosmetics. Sulfa allergies can produce severe reactions including Stevens-Johnson syndrome, and topical use risks resistance.

Skin benefits

  • No legitimate benefit in cosmetics — banned

Known concerns

  • EU Annex II banned medicinal antibiotic
  • Sulfa allergy can be severe (Stevens-Johnson syndrome)
  • Antimicrobial resistance concerns from misuse
  • Prescription pharmaceutical, not cosmetic

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.