Sodium iodide

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Sodium iodide

Sodium iodide is a white, crystalline saltSalt

In chemistry, a salt is any ionic compound composed of cations and anions so that the product is neutral ....
with chemical formulaChemical formula

A chemical formula is a concise way of expressing information about the atoms that constitute a particular chemical compoun...
NaSodium

Sodium is a chemical element which has the symbol Na , atomic number 11, atomic mass 22.9898 g/mol, oxidation number +1....
IIodine

Iodine , is a chemical element in the periodic table that has the symbol I and atomic number 53....
used in radiation detection, treatment of iodine deficiencyIodine deficiency

Iodine is an essential trace element; the thyroid hormones thyroxine and triiodotyronine contain iodine....
, and as a reactant in the Finkelstein reactionFinkelstein reaction

The Finkelstein reaction is an SN2 reaction that involves the exchange of one halogen atom for another....
.

Solubility of NaI in various solvents
(g NaI / 100g of solvent at 25°C)
H₂OWater (molecule) Summary Water is the most abundant molecule on Earth, composing 70-75% of the Earth's surface as liquid and solid state in addition ...	184
Liquid ammoniaAmmonia Ammonia is a compound of nitrogen and hydrogen with the formula NH3....	162
Liquid sulfur dioxideSulfur dioxide Sulfur dioxide is the chemical compound with the formula SO2....	15
MethanolMethanol Methanol, also known as methyl alcohol or wood alcohol, is a chemical compound with chemical formula CH3OH....	62.5 - 83.0
Formic acidFormic acid Formic acid is the simplest carboxylic acid....	61.8
AcetonitrileAcetonitrile Acetonitrile is the chemical compound with formula of CH3CN....	24.9
AcetoneAcetone In chemistry, acetone is the simplest representative of the ketones....	28.0
FormamideFormamide Formamide, also known as methanamide, is an amide derived from formic acid....	57 - 85
AcetamideAcetamide Overview Acetamide, CH3CONH2, the amide of acetic acid, is a white crystalline solid in pure form....	32.3
DimethylformamideDimethylformamide Dimethylformamide is a clear liquid, miscible with water and majority of organic solvents....	3.7 - 6.4

Uses

Sodium iodide is commonly used to treat and prevent iodine deficiencyIodine deficiency

Iodine is an essential trace element; the thyroid hormones thyroxine and triiodotyronine contain iodine....
.

Sodium iodide is used in polymerase chain reactionPolymerase chain reaction

Polymerase chain reaction is a molecular biology technique, for enzymatically replicating DNA without using a living organ...
s, and also (as an acetoneAcetone

In chemistry, acetone is the simplest representative of the ketones....
solution) in the Finkelstein reactionFinkelstein reaction

The Finkelstein reaction is an SN2 reaction that involves the exchange of one halogen atom for another....
, for conversion of an alkyl chloride into an alkyl iodide. This relies on the insolubility of sodium chlorideSodium chloride

Sodium chloride, also known as common salt, table salt, or halite, is a chemical compound with the formula NaCl....
in acetoneAcetone

In chemistry, acetone is the simplest representative of the ketones....
to drive the reaction.

R- + ? R- +

Sodium iodide crystals doped with thalliumThallium

Thallium is the chemical element in the periodic table that has the symbol Tl and atomic number 81....
, NaI(Tl), when subjected to ionising radiation, emit photonPhoton

In modern physics, the photon is the elementary particle responsible for electromagnetic phenomena....
s and are used in scintillation detectorScintillation detector Overview

#REDIRECT Scintillator ...
s, traditionally in nuclear medicineNuclear medicine Overview

Nuclear medicine is a branch of medicine and medical imaging that uses unsealed radioactive substances in diagnosis and ther...
, geophysicsGeophysics

Geophysics, the study of the earth by quantitative physical methods, especially by seismic, electromagnetic, and radioactivi...
, nuclear physicsNuclear physics

Nuclear physics is the branch of physics concerned with the nucleus of the atom....
, environmental measurements, etc. NaI(Tl) is the most widely used scintillation material and has the highest light output. The crystals are usually coupled with a photomultiplierPhotomultiplier Summary

Photomultiplier tubes are extremely sensitive detectors of light in the ultraviolet, visible and near infrared....
tube, in a hermetically sealed assembly, as sodium iodide is hygroscopic. Fine tuning of some parameters can be achieved by varying the conditions of the crystal growth. Crystals with higher level of doping are used in X-rayFacts About X-ray

X-rays are a form of electromagnetic radiation with a wavelength in the range of 10 to 0.01 nanometres, corresponding to fre...
detectors with high spectrometric quality. Sodium iodide can be used both as single crystalSingle crystal

A single crystal, also called monocrystal, is a crystalline solid in which the crystal lattice of the entire sample is...
s and as polycrystals for this purpose.

Sodium iodide

Uses

See also

External links