Used in fertilizers to supply potassium, an essential nutrient for plant growth, especially in crops like potatoes, tomatoes, and corn. Commonly used in medicine as an electrolyte supplement to treat or prevent low potassium levels in the blood. Serves as a salt substitute in food for people on low-sodium diets, helping reduce sodium intake without sacrificing taste. Employed in the production of potassium hydroxide and other potassium compounds through electrolysis. Used in some types of lethal injection drugs to stop the heart. Applied in laboratory settings as a component of buffer solutions and for calibrating equipment. Found in water softeners to regenerate ion-exchange resins by removing calcium and magnesium ions from hard water.