Product Short Description: Potassium Chloride Exporter, Manufacturer Product Description: Potassium Chloride is a high purity, dry crystalline inorganic/metal halide salt composed of potassium and chlolrine, KCl. It has a molar mass of 74.551 g/mol and occurs naturally as the mineral slyvite. Potassium chloride is often referred to as muriate of potash (MOP), particularly when used as a fertilizer.