Potassium Hydroxide
Fine
Official INCI name
Potash lye — used in small amounts to balance acidity or to make soap, and none of it remains free in a finished product.
What it does
pH adjuster or chelator. Keeps acidity in range and binds metal ions so the formula stays stable.
“Potassium Hydroxide” is its name in the EU glossary of common ingredient names (no. 22655), the names labels in the EU must use. © European Union, EUR-Lex.