Preservative
Bronopol
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
2-Bromo-2-nitropropane-1,3-diol — a formaldehyde-releasing preservative. EU caps it at 0.1% and prohibits combining with amines that could form nitrosamines; formaldehyde release drives the low score.
Skin benefits
- Effective broad-spectrum preservative
- Active at very low %
- Useful in challenging formulations
Known concerns
- Formaldehyde releaser
- Can form nitrosamines with secondary amines
- Skin sensitization and irritation
- EU restricts use and bans in oral products
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related preservatives
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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.