Potassium iodide
Catalog Number
ACM7681110
CAS
7681-11-0
IUPAC Name
Potassium;iodide
Synonyms
Potassium monoiodide
Application
Potassium iodide serves multiple critical purposes, primarily as a source of iodine essential for maintaining thyroid health and preventing disorders such as goiter. It is utilized as a supplement in table salt and animal feed to address iodine deficiencies. In medical contexts, potassium iodide plays a pivotal role in regulating thyroid function and is used to protect the thyroid gland from radioactive iodine exposure following environmental contamination by iodine-131. This compound also finds applications in photography, particularly in the production of photographic emulsions and processes, due to its ability to dissolve iodine and form the triiodide ion. Additionally, it is an essential analytical reagent, used in animal chemistry, and offers therapeutic benefits as a radical scavenger, expectorant, and treatment for conditions like sporotrichosis, erythema nodosum, and nodular vasculitis. Its versatility and effectiveness across various fields underscore its significance as an indispensable chemical compound.
Molecular Weight
166.003
Molecular Formula
IK
Product Information
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.
Canonical SMILES
[K+].[I-]
InChI
InChI=1S/HI.K/h1H;/q;+1/p-1
InChI Key
NLKNQRATVPKPDG-UHFFFAOYSA-M
Boiling Point
184 °C
Melting Point
681 °C
Flash Point
1330 °C
Purity
99%+
Density
1.7 g/cm³
Solubility
Slightly soluble in ethanol
Appearance
Yellow crystals
Storage
2-8 °C
Complexity
2
Covalently-Bonded Unit Count
2
Exact Mass
165.86818
Heavy Atom Count
2
MDL Number
MFCD00011405
Monoisotopic Mass
165.86818
Odor
Odorless
Refractive Index
1.677
Rotatable Bond Count
0
Topological Polar Surface Area
0 Ų
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