For kids aged 5 and older (school-age children), potassium hydroxide can cause skin or eye irritation and at higher amounts can burn. When it is used in skin products, rules require it only be used in low amounts and formulated so it won’t irritate. That makes it a moderate concern for children.
Use products made for children or products that say they are formulated to avoid irritation. Don’t use industrial or cleaning products that contain potassium hydroxide on skin. If you try a new product that lists it, do a small patch test on the child’s arm first and wait 24 hours. Avoid using products with this ingredient on broken, red, or very sensitive skin. Keep products out of reach and supervise older children when they use them.
Avoid products where potassium hydroxide is high on the ingredient list or not clearly formulated for skin use—regulatory sources (EU Cosmetics Directive and Cosmetic Ingredient Review) restrict its use and require limits because it can irritate or burn. Watch for immediate stinging, redness, blistering, or any eye contact; if that happens, rinse thoroughly with water and seek medical care if symptoms are severe or do not quickly improve (sources: U.S. National Library of Medicine, Environment Canada, Cosmetic Ingredient Review, EU Cosmetics Directive).
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This ingredient is found in the following products:
This list shows products that contain Potassium Hydroxide or its alternative names.
Scientific research related to this ingredient:
These research articles provide scientific evidence about Potassium Hydroxide safety and effects.
Use caution with Potassium Hydroxide for 5+ year old children. Some safety concerns have been identified.
Banned or heavily restricted in one or more countries.
May harm organs like liver, kidneys, or lungs with repeated use.
Linked to long-term health effects after years of use or exposure.
Potassium Hydroxide is commonly found in skincare products, cosmetics, and topical applications. Always check ingredient labels before use.
The appropriate age depends on the specific ingredient properties and concentration. This analysis is for 5+ year old children. Use the age selector above to check other ages.
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