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- sodium iodide
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- the 14th letter of the Roman alphabet (同)n
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- nitrogenの化学記号
- sodium(ラテン語natrium)の化学記号
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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/11/20 20:52:54」(JST)
[Wiki ja表示]
NAI, NaI
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[Wiki en表示]
| Sodium iodide |
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| Identifiers |
| CAS number |
7681-82-5 Y,
13517-06-1 (dihydrate) |
| PubChem |
5238 |
| ChemSpider |
5048 Y |
| UNII |
F5WR8N145C Y |
| ChEBI |
CHEBI:33167 Y |
| ChEMBL |
CHEMBL1644695 N |
| RTECS number |
WB6475000 |
| Jmol-3D images |
Image 1 |
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InChI=1S/HI.Na/h1H;/q;+1/p-1 Y
Key: FVAUCKIRQBBSSJ-UHFFFAOYSA-M Y
InChI=1/HI.Na/h1H;/q;+1/p-1
Key: FVAUCKIRQBBSSJ-REWHXWOFAL
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| Properties |
| Molecular formula |
NaI |
| Molar mass |
149.89 g/mol |
| Appearance |
white solid
deliquescent |
| Odor |
odorless |
| Density |
3.67 g/cm3 |
| Melting point |
661 °C, 934 K, 1222 °F
|
| Boiling point |
1304 °C, 1577 K, 2379 °F
|
| Solubility in water |
178.8 g/100 mL (20 °C)
184 g/100 mL (25 °C)
294 g/100 mL (70 °C)
302 g/100 mL (100 °C) |
| Solubility |
soluble in ethanol and acetone (39.9 g/100 mL) |
| Acidity (pKa) |
8-9.5 |
| Refractive index (nD) |
1.7745 |
| Structure |
Coordination
geometry |
Octahedral |
| Thermochemistry |
Std enthalpy of
formation ΔfHo298 |
−288 kJ·mol−1[1] |
Standard molar
entropy So298 |
91 J·mol−1·K−1[1] |
| Hazards |
| MSDS |
[1] |
| EU Index |
Not listed |
| Main hazards |
Irritant, can harm the unborn child |
| Flash point |
Non-flammable |
| Related compounds |
| Other anions |
Sodium fluoride
Sodium chloride
Sodium bromide |
| Other cations |
Lithium iodide
Potassium iodide
Rubidium iodide
Caesium iodide |
N (verify) (what is: Y/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
| Infobox references |
Sodium iodide is a white, crystalline salt with the chemical formula NaI, and is used in radiation detection, treatment of iodine deficiency, and as a reactant in the Finkelstein reaction.
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Contents
- 1 Production
- 2 Uses
- 2.1 Food supplement
- 2.2 Organic synthesis
- 2.3 Radiation physics and medicine
- 3 Solubility data
- 4 See also
- 5 References
- 6 External links
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Production
Sodium iodide is manufactured from the reaction between iodine and sodium hydroxide.
Uses
Food supplement
Sodium iodide, as well as potassium iodide, is commonly used to treat and prevent iodine deficiency. Iodized table salt contains one part sodium or potassium iodide to 100,000 parts of sodium chloride.[2]
Organic synthesis
Sodium iodide is used in the Finkelstein reaction, for conversion of an alkyl chloride into an alkyl iodide. This method relies on the insolubility of sodium chloride in acetone to drive the reaction:
- R-Cl + NaI → R-I + NaCl
Radiation physics and medicine
Sodium iodide activated with thallium, NaI(Tl), when subjected to ionizing radiation, emits photons (i.e., scintillate) and is used in scintillation detectors, traditionally in nuclear medicine, geophysics, nuclear physics, and environmental measurements. NaI(Tl) is the most widely used scintillation material and has the highest light yield of the commonly used scintillators. The crystals are usually coupled with a photomultiplier tube, in a hermetically sealed assembly, as sodium iodide is hygroscopic. Fine-tuning of some parameters (i.e., radiation hardness, afterglow, transparency) can be achieved by varying the conditions of the crystal growth. Crystals with a higher level of doping are used in X-ray detectors with high spectrometric quality. Sodium iodide can be used both as single crystals and as polycrystals for this purpose.
The radioactive iodide salt of sodium, Na131I, is used for the treatment of thyroid cancer and hyperthyroidism.[3]
Solubility data
Solubility of NaI in various solvents
(g NaI / 100g of solvent at 25°C)
| H2O |
184 |
| Liquid ammonia |
162 |
| Liquid sulfur dioxide |
15 |
| Methanol |
62.5 - 83.0 |
| Formic acid |
61.8 |
| Acetonitrile |
24.9 |
| Acetone |
28.0 |
| Formamide |
57 - 85 |
| Acetamide |
32.3 |
| Dimethylformamide |
3.7 - 6.4 |
| [4] |
See also
- Gamma spectroscopy
- Scintillation counter
- Teratology
References
- ^ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed.. Houghton Mifflin Company. p. A23. ISBN 0-618-94690-X.
- ^ Lyday, Phyllis A. "Iodine and Iodine Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Wiley-VCH, Weinheim, ISBN 978-3-527-30673-2 doi:10.1002/14356007.a14_381 Vol. A14 pp. 382–390.
- ^ The Free Dictionary: sodium iodide 131I
- ^ Burgess, J. "Metal Ions in Solution" (Ellis Horwood, New York, 1978) ISBN 0-85312-027-7
External links
- International Chemical Safety Card 1009 - Sodium Iodide (Anhydrous)
- Material Safety Data Sheet (MSDS) - Safety data for sodium iodide
- Sodium Iodide Consumer Information
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Sodium compounds
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|
- NaAlO2
- NaBH4
- NaBH3(CN)
- NaBiO3
- NaBr
- NaBrO3
- NaCH3COO
- NaC6H5CO2
- NaC6H4(OH)CO2
- NaCN
- NaCl
- NaClO
- NaClO2
- NaClO3
- NaClO4
- NaF
- NaH
- NaHCO3
- NaH2PO4
- NaHSO3
- NaHSO4
- NaI
- NaIO3
- NaIO4
- NaMnO4
- NaN3
- NaNH2
- NaNO2
- NaNO3
- NaO2
- NaOH
- NaPO2H2
- NaReO4
- NaSCN
- NaSH
- NaTcO4
- NaVO3
- Na2CO3
- Na2C2O4
- Na2CrO4
- Na2Cr2O7
- Na2MnO4
- Na2MoO4
- Na2O
- Na2O2
- Na2O(UO3)2
- Na2S
- Na2SO3
- Na2SO4
- Na2S2O3
- Na2S2O4
- Na2S2O5
- Na2S2O6
- Na2S2O7
- Na2S2O8
- Na2Se
- Na2SeO3
- Na2SeO4
- Na2SiO3
- Na2Te
- Na2TeO3
- Na2Ti3O7
- Na2U2O7
- NaWO4
- Na2Zn(OH)4
- Na3N
- Na3P
- Na3VO4
- Na4Fe(CN)6
- Na5P3O10
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Chemical formulas
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UpToDate Contents
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English Journal
- Chemical studies on polyaniline titanotungstate and its uses to reduction cesium from solutions and polluted milk.
- El-Naggar IM, Zakaria ES, Ali IM, Khalil M, El-Shahat MF.SourceAtomic Energy Authority, Hot Laboratory Center, P. No. 13759, Cairo, Egypt.
- Journal of environmental radioactivity.J Environ Radioact.2012 Oct;112:108-17. Epub 2012 Jun 14.
- Polyaniline titanotungstate (PATiW) was synthesized by the sol-gel method. Adsorption isotherm studies of Cs(+) from aqueous solution are described. Elemental Composition, chemical solubility, ion-exchange capacity (IEC) and pH-titration curve are studied. Distribution coefficients (K(d)) for 10 met
- PMID 22705414
- Activity measurement of electron-capture radionuclides by a KX-gamma-coincidence method at VNIIM.
- Tereshchenko E, Moiseev N.SourceD.I. Mendeleyev Institute for Metrology (VNIIM), 19 Moskovsky Prospect, St. Petersburg 198005, Russia.
- Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.Appl Radiat Isot.2012 Sep;70(9):2066-9. Epub 2012 Feb 27.
- The article describes the development of a KX-γ-coincidence method implemented in the prototype setup developed at the ionizing radiation department of the D.I. Mendeleyev Institute for Metrology. The first part was presented at Third European IRPA Congress (2010 June 14-18, Helsinki, Finland). NaI
- PMID 22560775
Japanese Journal
- Optimization of Laser Processing in the Fabrication of Stents
- Chen Cheng-Shun,Lin Sheng-Yao,Chou Nai-Kuan [他]
- Materials Transactions 53(11), 2023-2027, 2012-11
- NAID 40019466196
- Measurement of Gamma-Ray Pulse Height Spectrum Under p-Li Neutron Beam Using NaI(Tl) Scintillator With Pulse-Shape-Discrimination Technique (Proceedings of the Sixth International Symposium on Radiation Safety and Detection Technology : ISORD-6) -- (RADIATION DETECTION AND SENSOR)
- KAMADA So,TAKADA Masashi
- Progress in nuclear science and technology 3, 112-115, 2012-10
- NAID 40019464464
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