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Antioxidant

SODIUM HYDROSULFITE

CAS 7775-14-6 Updated
22

Safety score · 0–100

Caution

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

About

A strong reducing agent used to strip hair color. Hazardous to handle, releases sulfur dioxide, irritates skin/eyes, and is restricted under EU Annex III.

Function

REDUCINGVISCOSITY CONTROLLING

Skin benefits

  • Removes oxidation hair dye
  • Bleaches in formula

Known concerns

  • Self-heating and reactive
  • Releases SO2
  • Respiratory and skin irritation
  • EU Annex III restricted
  • Asthma trigger

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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Check your shelf

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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.