Preservative
Butyl 4-hydroxybenzoate and its salts Propyl 4-hydroxybenzoate and its salts
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Butyl- and propyl-paraben (and their salts) — preservatives heavily restricted in the EU due to endocrine-disruption concerns. Allowed only at low caps and banned in leave-on products for young children.
Function
Skin benefits
- Effective broad-spectrum preservatives
- Active at low % vs broad microbe range
Known concerns
- EU Annex V: butylparaben and propylparaben capped at 0.14% (sum)
- Endocrine-disruption concerns
- Banned in leave-on for under-3s nappy area
- Skin sensitization in some users
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.