Potassium chlorate is a white crystalline solid. It is used as an industrial oxidiser. It can also appear as colourless, lustrous crystals or white granules. It has a reported molar mass of 122.55 g/mol. The solid dissolves slowly in water and is almost insoluble in alcohol. Published reference data report a density of 2.32 g/cm³. Reported melting points range from 357 to 368 °C.