potassium hydroxide

POTASSIUM HYDROXIDE

Data confidence:High

Function

pH Adjuster, Buffering Agent

EWG Safety Score

8/10High concern

About this ingredient

A strong alkaline compound used in cosmetics as a pH buffer and adjusting agent to neutralize acids and raise pH in formulations. It helps solubilize certain ingredients and stabilize emulsions, though it is caustic and requires careful handling in rinse-off products.

Found in 3+ sunscreens