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Antioxidant

POTASSIUM SULFITE

CAS 10117-38-1 / 23873-77-0 Updated
50

Safety score · 0–100

Moderate

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

About

An inorganic sulfite salt — antioxidant and reducing agent in cosmetics, also used in hair-waving products. EU-permitted with concentration limits; well-known to trigger reactions in sulfite-sensitive users.

Function

ANTIOXIDANTHAIR WAVING OR STRAIGHTENINGPRESERVATIVEREDUCING

Skin benefits

  • Antioxidant and reducing-agent activity
  • Effective at low concentrations
  • Long-standing use in cosmetics and food

Known concerns

  • Documented allergic reactions in sulfite-sensitive individuals
  • Asthma exacerbation risk in sulfite-sensitive asthmatics
  • EU concentration restrictions in cosmetics
  • Can release SO2 in acidic 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 — always read the physical product label and consult a healthcare professional for personal concerns.