Potassium iodide

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Description:
Potassium iodide is an inorganic compound with the chemical formula KI. This white salt is the most commercially significant iodide compound, with approximately 37,000 tons produced in 1985. It is less hygroscopic (absorbs water less readily) than sodium iodide, making it easier to work with. Aged and impure samples are yellow because of aerial oxidation of the iodide to elemental iodine.
4 KI + 2 CO<sub>2</sub> + O<sub>2</sub> → 2 K<sub>2</sub>CO<sub>3</sub> + 2 I<sub>2</sub>


Potassium iodide is medicinally supplied in 130 mg tablets for emergency purposes. Potassium iodide may also be administered as a "saturated solution of potassium iodide" (SSKI) which in the U.S.P. generic formulation contains 1000&nbsp;mg of KI per mL of solution. This represents 333&nbsp;mg KI and about 250&nbsp;mg iodide (I <sup>-</sup>) in a typical adult dose of 5 drops, assumed to be ⅓ mL.. Thus, two (2) drops of U.S.P. SSKI solution is equivalent to one 130&nbsp;mg KI tablet (100&nbsp;mg iodide).

SSKI can also be prepared by truly...
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