Potassium hydroxide is a strong alkaline compound used in cosmetics to adjust the pH of a product. It helps to ensure that the product's acidity or alkalinity is within a safe and effective range for skin application. It is also used in the saponification process to make liquid soaps.
NonePH adjusterVeganEvidence: High
BenefitNone 0 / 4
RiskModerate 1.5 / 4
Irritation
Sensitization
Rated by SpottyLabs' ingredient methodology, independent of brands.
Things to watch
can be highly corrosive in concentrated forms
potential for irritation if not properly neutralized
Spot questionable ingredients in seconds
SpottyLabs scans any skincare product and rates every ingredient for benefit, risk and safety. Free and independent — no brand is paying us.
Why is potassium hydroxide in my skincare product?
Potassium hydroxide is used in skincare products primarily as a pH adjuster. It helps to bring the product's pH level into a range that is safe and effective for topical application, preventing it from being too acidic or too alkaline.
Is potassium hydroxide safe?
When used in cosmetic formulations, potassium hydroxide is present in very low concentrations and is carefully neutralized, making it safe for use. In its concentrated form, it is a strong base and can be corrosive, but this is not how it is used in finished products.
Spotty Labs