Potassium chloride (\(KCl\)) is a mineral salt and electrolyte used to prevent or treat low blood potassium (hypokalemia). It is essential for regulating nerve signals, muscle movement, and heart function. It is available as prescription medications (e.g., Klor-Con, Micro-K), over-the-counter supplements, and sodium-free table salt substitutes,Utilized in water softeners, fertilizers, and food processing.