pH Adjuster
POTASSIUM HYDROXIDE
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Caustic potash — a strong base used in tiny amounts to adjust pH or make soap. Corrosive in raw form but completely safe once neutralized in the finished cosmetic.
Function
Skin benefits
- Adjusts pH in formulas
- Saponifies fatty acids into soaps
- Effective neutralizer for acrylate gels
Known concerns
- Strongly corrosive in raw form
- Causes severe burns at >2%
- Must be neutralized in finished product
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
PubChem
U.S. NIH compound data, GHS hazard codes and toxicity literature.
Related ph adjusters
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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.