Appearance and character: white crystal, extremely salty taste, odorless and non-toxic. Soluble in water and glycerol, slightly soluble in alcohol, insoluble in ether, acetone and hydrochloric acid [7]. It is hygroscopic and easy to agglomerate; The solubility in water increases rapidly with the increase of temperature, and it often metacomposes with sodium salts to form new potassium salts.
Refractive index: 1.334
Water solubility: 342 g/L (20 ºC)
Stability: Stable. It is incompatible with strong oxidants and strong acids. Moistureproof. Hygroscopicity.
Storage conditions: 2-8ºC
