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Inorganic sulfites and bisulfites (12)

68

Safety score · 0–100

Fine

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

About

Inorganic Sulfites And Bisulfites (12) is a cosmetic ingredient. Exercise caution due to limited available safety data.

Inorganic sulfites and bisulfites (including sodium sulfite, sodium bisulfite, potassium sulfite, potassium bisulfite, and others) are authorised preservatives in EU Annex V (the list of permitted preservatives). They are permitted at varying concentrations depending on the product type: up to 0.67% (as free SO2) for certain products and up to 6.7% for others. Despite their preservative efficacy, they are known sensitisers and may cause allergic reactions, particularly in asthmatic individuals. The safety score reflects their permitted but sensitisation-associated use.

Skin benefits

  • Preservative efficacy
  • Antioxidant properties in formulations

Known concerns

  • Known skin and respiratory sensitiser
  • May cause allergic reactions in asthmatics
  • Oxidation to sulfate on exposure to air

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.