Used in medicine as a treatment for low potassium levels in the blood, which can prevent or manage conditions like hypokalemia. It is also administered intravenously in critical care settings. In agriculture, it serves as a key component in fertilizers to provide essential potassium, promoting plant growth and improving crop yield. Industrially, it is utilized in water softening systems to regenerate ion-exchange resins, helping to remove calcium and magnesium ions from hard water. Additionally, it is employed in food processing as a salt substitute for individuals on low-sodium diets, enhancing flavor without adding sodium. In scientific research, it is used to prepare buffer solutions and in laboratory experiments requiring potassium ions. It also plays a role in lethal injections for capital punishment, acting as a stopping agent for the heart.