Reducing agent (restricted)
AMMONIUM SULFITE
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Ammonium sulfite is a reducing agent restricted in EU cosmetics. Sulfites can trigger asthma and contact allergy, and the compound releases irritating sulfur dioxide on degradation.
Skin benefits
- Functions as a reducing and antioxidant agent
- Used historically in hair waving
- Inhibits oxidative browning
Known concerns
- Restricted under EU Annex III with strict limits
- Sulfite is a known sensitizer and asthma trigger
- Releases sulfur dioxide upon decomposition
- Ammonia odor and irritation potential
- Not suitable for sensitive skin
References
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.