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KCl where, K= potassium Cl= chlorine The chemical compound potassium chloride (KCl) is a metal halide salt composed of potassium and chlorine. In its pure state it is odorless. It has a white or colorless vitreous crystal, with a crystal structure that cleaves easily in three directions.
The oxidation number of potassium in potassium chloride is 1. 1  Formula: KCl. 2  Hill system formula: Cl 1 K 1. 3  CAS registry number: [7447-40-7]. 4  Formula weight: 74.551. 5  Class: chloride. 6  Colour: white. 7  Appearance: crystalline solid. 8  Melting point: 771Â°C. 9  Boiling point: 1500Â°C.