Preservative
Polyhexamethylene biguanide hydrochloride
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A polymeric biguanide preservative. Effective antimicrobial but classified as a suspected carcinogen by inhalation; EU caps it at 0.1% and bans use in sprays.
Skin benefits
- Broad-spectrum biocide preservative
- Effective at low concentration
Known concerns
- CLP Carc. 2 (suspected human carcinogen by inhalation)
- SCCS restricts max 0.1% in cosmetics, banned in spray products
- Skin and respiratory sensitiser
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.