HYDROXYSTEROID OXIDOREDUCTASE
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
HYDROXYSTEROID OXIDOREDUCTASE is a cosmetic ingredient used in product formulation. Exercise caution due to limited available safety data.
Hydroxysteroid oxidoreductase is an enzyme classified under the EU Cosmetics Regulation with a specific H334 (respiratory sensitizer) warning, requiring its exclusion from aerosolized or inhalation-exposure cosmetic products. Enzymes in this class may be used in rinse-off products where inhalation exposure is minimal, but are typically avoided in leave-on or spray formulations due to the potency of respiratory sensitization.
Known concerns
- Respiratory sensitizer — may cause allergy if inhaled (H334)
- Enzyme with potential for occupational sensitization
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 — always read the physical product label and consult a healthcare professional for personal concerns.