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The chemical compound potassium chloride (KCl) is a metal halide salt composed of potassium and chloride.It is odorless and has a white or colorless vitreous crystal appearance. The solid dissolves readily in water and its solutions have a salt-like taste.KCl is used in medicine, scientific applications, food processing, and used to cause cardiac arrest as the third drug in the three drug cocktail for executions by lethal injection.rally, potassium chloride is toxic in excess; the LD50 is around 2.5 g/kg (meaning that a lethal dose for 50% of people weighing 75 kg (165 lb) is about 190 g (6.7 ounces)).
Potassium chloride naturally occurs as a white or colorless solid that has a powdery, crystalline appearance. Its chemical formula is KCl, consists of one potassium (K) atom and one chlorine (Cl) atom.An ionic compound is made of a metal element and a nonmetal element. In potassium chloride, the metal element is potassium (K) and the nonmetal element is chlorine (Cl), so we can say that KCl is an ionic compound.esson Summary. Potassium chloride is an ionic compound and is a salt that naturally occurs as a solid that has a powdery and crystalline appearance. Its chemical formula is KCl: it consists of one potassium (K+) ion and one chlorine (Cl-) ion.