Hair Dye Auxiliary (Restricted)
HYDROXYLAMINE SULFATE
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Reducing agent and stabilizer used only in oxidative hair dye systems, capped at 1 percent in the EU. It is a strong skin and respiratory sensitizer and a suspected carcinogen, so use is tightly restricted.
Skin benefits
- Used as a stabilizer or reducing aid in some oxidative hair dyes
- No direct skin-care benefit
Known concerns
- EU Annex III restricted: max 1 percent in oxidative hair dyes only
- Skin sensitizer and respiratory sensitizer
- Suspected carcinogen (Carc. 2) and mutagen concerns
- Harmful if swallowed or in contact with 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.