CAS Number :7681-11-0
Chemical Name :Potassium iodide
Potassium iodide is white crystals, granules or powder; it has a strong, bitter, salty taste. It turns yellowish when exposed to bright light due to photochemical decomposition, leaving traces of free iodine. It is soluble in water, alcohol, acetone and glycerol. It is slightly soluble in ether and ammonia. It can be prepared by the reaction of iodine with hot potassium hydroxide solution and subsequent separation from iodate (which is also formed) by fractional crystallization. It has the interesting property of dissolving iodine in solution to form the triiodide ion I3-, which is brown. Potassium iodide is widely used as an analytical reagent, in photography and also as an additive to table salt to prevent goiter and other disorders resulting from iodine deficiency.