Product Name
Potassium iodide
Synonyms
Potassium monoiodide
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. Potassium iodide occurs naturally in kelp. Kelp’s iodide content can range from 89 µg/g to 8165µg/g.Aged and impure samples are yellow because of the slow oxidation of the salt to potassium carbonate and elemental iodine.Potassium iodide is medicinally used for thyroid blockade, thyroid storm and also as an expectorant. It is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system.
IUPAC Name
Potassium;iodide
Canonical SMILES
[K+].[I-]
InChI
InChI=1S/HI.K/h1H;/q;+1/p-1
InChI Key
NLKNQRATVPKPDG-UHFFFAOYSA-M
Solubility
Slightly soluble in ethanol
Appearance
Yellow crystals
Color/Form
Colorless or white, cubical crystals, white granules, or powder;HEXAHEDRAL CRYSTALS, EITHER TRANSPARENT OR SOMEWHAT OPAQUE
Covalently-Bonded Unit Count
2
MeSH Entry Terms
Antistrumin;Iodide, Potassium;Ioduro Potasico Rovi;Iosat;Jod beta;Jodetten Henning;Jodgamma;Jodid;Jodid dura;Jodid Hexal;Jodid ratiopharm;Jodid Verla;Jodid-ratiopharm;Mono Jod;Mono-Jod;Pima;Potassium Iodide;SSKI;Thyro Block;Thyro-Block;Thyroprotect
Monoisotopic Mass
165.86818
Other Experimental
Slightly deliquescent in moist air; on long exposure to air becomes yellow due to liberation of iodine, small amount of iodate may be formed; light and moisture accelerate the decomposition; aqueous solution becomes yellow in time due to oxidation, but a small amount of alkali prevents it;30 g KI with 21 mL water gives 30 mL of a saturated solution at 25 °C;Slightly hygroscopic in moist air;Readily dissolves elemental iodine /Potassium iodide solution/
Stability
Stable. Protect from light and moisture. Incompatible with strong reducing agents, strong acids, steel, aluminium, alkali metals, brass, magnesium, zinc, cadmium, copper, tin, nickel and their alloys.
Storage Conditions
Store at RT.
Topological Polar Surface Area
0 Ų
Vapor Pressure
0.31 mm Hg ( 25 °C)