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CAS Number 7681-11-0
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Linear Formula KI
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Molecular Weight 166.00
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EC Number 231-659-4
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MDL number MFCD00011405
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PubChem Substance ID 57651758
Potassium iodide is a chemical compound, medication, and dietary
supplement.[1][2] As a medication
it is used to treat hyperthyroidism, in radiation
emergencies, and to protect the thyroid gland when certain
types of radiopharmaceuticals are used.[3]In the developing world it is also used
to treat skin sporotrichosis and phycomycosis.
Detailed description
As a supplement it is used in those who have low intake of iodine in the diet.[2] It is given by
mouth.[3]
Common side effects include vomiting, diarrhea,
abdominal pain, rash, and swelling of the salivary glands.[3] Other side effects
include allergic reactions, headache, goitre,
and depression.[4] While use during pregnancy may harm the baby
this use is still recommended in radiation emergencies.[3] Potassium iodide has
the chemical formula KI.[5] Commercially it is
made by mixing potassium
hydroxide with iodine.[6]
Potassium iodide has been used medically since at
least 1820.[7] It is on the World Health Organization's List
of Essential Medicines, the most effective
and safe medicines needed in a health system.[8] Potassium iodide is
available as a generic
medication and over the counter. In the United States a course of treatment is less than 25
USD.[9] Potassium iodide is
also used for the iodization
of salt.
Industrial uses
KI is used with silver nitrate to make silver
iodide (AgI) an important chemical in film photography. KI is a
component in some disinfectants and hair treatment chemicals. KI is also used
as a fluorescence quenching agent in biomedical
research, an application that takes advantage of collisional quenching of
fluorescent substances by the iodide ion. However, for several fluorophores
addition of KI in µM-mM concentrations results in increase of fluorescence
intensity, and iodide acts as fluorescence enhancer.[29]
Potassium iodide is a component in the electrolyte
of dye sensitized solar cells (DSSC) along with
iodine.
Potassium iodide finds its most important
applications in organic synthesis mainly in the preparation of aryl iodides in
the Sandmeyer
reaction, starting from aryl amines. Aryl iodides are in turn used
to attach aryl groups to other organics by nucleophilic substitution, with
iodide ion as the leaving group.
PRICE
$1540.42/KG OR $700.19/IB
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