<unk>  is an ionic compound which is made of the following ions: K+I−. It crystallises in the sodium chloride structure. It is produced industrially by treating KOH with<unk> . It is a white salt, which is the most commercially significant<unk>  compound, with approximately 37,000 tons produced in 1985. It absorbs water less readily than sodium<unk> , making it easier to work with. Aged and impure samples are yellow because of the slow oxidation of the salt to potassium carbonate and elemental<unk> . : Inorganic chemistry Since the<unk>  ion is a mild reducing agent, is easily oxidised to by powerful oxidising agents such as chlorine: : This reaction is employed in the isolation of<unk>  from natural sources. Air will oxidize<unk> , as evidenced by the observation of a purple extract when aged samples of<unk>  are rinsed with dichloromethane. As formed under acidic conditions, hydriodic acid (HI) is a stronger reducing agent. Like other<unk>  salts, forms when combined with elemental<unk> . : Unlike , salts can be highly water-soluble. Through this reaction,<unk>  is used in redox titrations. Aqueous , "Lugol's solution", is used as a disinfectant and as an etchant for gold surfaces.<unk>  and silver nitrate are used to make silver(I)<unk> , which is used for high speed photographic film and for cloud seeding: : Organic chemistry<unk>  serves as a source of<unk>  in organic synthesis. A useful application is in the preparation of aryl<unk> s from arenediazonium salts. 400px<unk> , acting as a source of<unk> , may also act as a nucleophilic catalyst for the alkylation of alkyl chlorides, bromides, or mesylates.
Potassium iodide
Sodium fluoride
Potassium fluoride
Lugol's iodine
Sodium benzoate
Amine fluoride
Silver diammine fluoride
Perchloryl fluoride