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Sodium iodide information


Sodium iodide
Sodium iodide
Sodium iodide
Sodium iodide
Sodium iodide

NaI(Tl) scintillators
Identifiers
CAS Number
  • 7681-82-5 checkY
  • 13517-06-1 (dihydrate) ☒N
3D model (JSmol)
  • Interactive image
ChEBI
  • CHEBI:33167 checkY
ChEMBL
  • ChEMBL1644695 ☒N
ChemSpider
  • 5048 checkY
ECHA InfoCard 100.028.800 Edit this at Wikidata
PubChem CID
  • 5238
RTECS number
  • WB6475000
UNII
  • F5WR8N145C checkY
CompTox Dashboard (EPA)
  • DTXSID2041125 Edit this at Wikidata
InChI
  • InChI=1S/HI.Na/h1H;/q;+1/p-1 checkY
    Key: FVAUCKIRQBBSSJ-UHFFFAOYSA-M checkY
  • InChI=1/HI.Na/h1H;/q;+1/p-1
    Key: FVAUCKIRQBBSSJ-REWHXWOFAL
SMILES
  • [Na+].[I-]
Properties
Chemical formula
 NaI
Molar mass 149.894[1]
Appearance white solid
deliquescent[1]
Odor odorless
Density 3.67 g cm−3[1]
Melting point 661 °C (1,222 °F; 934 K)[1]
Boiling point 1,304 °C (2,379 °F; 1,577 K)[1]
Solubility in water
 1587 g/L (0 °C)
1842 g/L (25 °C)
2278 g/L (50 °C)
2940 g/L (70 °C)
3020 g/L (100 °C)[2][3]
Solubility ethanol, acetone[1]
Band gap 5.89 eV[4][5]
Magnetic susceptibility (χ)
 −57×10−6 cm3 mol−1[6]
Refractive index (nD)
 1.93 (300 nm)
1.774 (589 nm)
1.71 (10 μm)[7]
Structure[8]
Crystal structure
 Halite, cF8
Space group
 Fm3m, No. 225
Lattice constant
a = 0.6462 nm
Formula units (Z)
 4
Coordination geometry
 Octahedral
Thermochemistry[9]
Heat capacity (C)
 52.1 J mol−1 K−1
Std molar
entropy (S⦵298)
 98.5 J mol−1 K−1
Std enthalpy of
formation (ΔfH⦵298)
 −287.8 kJ mol−1
Gibbs free energy (ΔfG⦵)
 −286.1 kJ mol−1
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Irritant, can harm the unborn child
GHS labelling:
Pictograms
 GHS07: Exclamation markGHS09: Environmental hazard
Signal word
 Danger
Hazard statements
 H315, H319, H400
Precautionary statements
 P273, P305+P351+P338[10]
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
1
0
1
Flash point Non-flammable
Safety data sheet (SDS) [1]
Related compounds
Other anions
 Sodium fluoride
Sodium chloride
Sodium bromide
Sodium astatide
Other cations
 Lithium iodide
Potassium iodide
Rubidium iodide
Caesium iodide
Francium iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Infobox references

Sodium iodide (chemical formula NaI) is an ionic compound formed from the chemical reaction of sodium metal and iodine. Under standard conditions, it is a white, water-soluble solid comprising a 1:1 mix of sodium cations (Na+) and iodide anions (I−) in a crystal lattice. It is used mainly as a nutritional supplement and in organic chemistry. It is produced industrially as the salt formed when acidic iodides react with sodium hydroxide.[11] It is a chaotropic salt.

  1. ^ a b c d e f Haynes, p. 4.86
  2. ^ Seidell, Atherton (1919). Solubilities of inorganic and organic compounds c. 2. D. Van Nostrand Company. p. 655.
  3. ^ Haynes, p. 5.171
  4. ^ Miyata, Takeo (1969). "Exciton Structure of NaI and NaBr". Journal of the Physical Society of Japan. 27 (1): 266. Bibcode:1969JPSJ...27..266M. doi:10.1143/JPSJ.27.266.
  5. ^ Guizzetti, G.; Nosenzo, L.; Reguzzoni, E. (1977). "Optical properties and electronic structure of alkali halides by thermoreflectivity". Physical Review B. 15 (12): 5921–5926. Bibcode:1977PhRvB..15.5921G. doi:10.1103/PhysRevB.15.5921.
  6. ^ Haynes, p. 4.130
  7. ^ Haynes, p. 10.250
  8. ^ Davey, Wheeler P. (1923). "Precision Measurements of Crystals of the Alkali Halides". Physical Review. 21 (2): 143–161. Bibcode:1923PhRv...21..143D. doi:10.1103/PhysRev.21.143.
  9. ^ Haynes, p. 5.36
  10. ^ "Sodium iodide 383112". Sigma Aldrich.
  11. ^ Cite error: The named reference Ullmann was invoked but never defined (see the help page).

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Sodium iodide

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detection of ionizing radiation by this crystal. These thallium-activated sodium iodide detectors are widely used for gamma ray detection to this day. Robert...

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an alkyl iodide by treatment with a solution of sodium iodide in acetone. Sodium iodide is soluble in acetone and sodium chloride and sodium bromide are...

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iodate, potassium iodide, and sodium iodide. Sodium iodate comprises 15 to 50 mg per kilogram of applicable salt. Sodium iodate is also used as a dough...

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compete with iodide for being transported by the sodium/iodide symporter, which is a transporter protein that co-transports Na+ and I− ions. Iodide transport...

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follicular cells by the sodium-iodide symporter. At the apical membrane iodide is secreted into the colloid by the chloride/iodide transporter pendrin. Thyroid...

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Thyroid

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two sodium ions and an iodide ion into the cell. Iodide then travels from within the cell into the lumen, through the action of pendrin, an iodide-chloride...

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Finkelstein reaction

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an alkyl iodide by treatment with a solution of sodium iodide in acetone. Sodium iodide is soluble in acetone while sodium chloride and sodium bromide...

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Na+/I− symporter transports two sodium ions across the basement membrane of the follicular cells along with an iodide ion. This is a secondary active...

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passing ozone gas over solid sodium iodide inside a platinum or palladium tube. The ozone oxidizes the sodium to form sodium peroxide. The iodine can be...

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inorganic sodium salts are sodium fluoride, sodium chloride, sodium bromide, sodium iodide, sodium sulfate, sodium bicarbonate and sodium carbonate. Sodium amide...

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Ethylene oxide

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reaction product of ethylene oxide with acyl chlorides in the presence of sodium iodide is a complex iodoethyl ester: (CH2CH2)O + RCOCl + NaI → RC(O)–OCH2CH2–I...

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Iodine compounds

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an alkyl iodide by treatment with a solution of sodium iodide in acetone. Sodium iodide is soluble in acetone and sodium chloride and sodium bromide are...

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radiation. Cesium iodide (CsI) in crystalline form is used as the scintillator for the detection of protons and alpha particles. Sodium iodide (NaI) containing...

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inhibitor of the thyroid sodium-iodide symporter. Iodine is an essential component of thyroxine. Since thiocyanates will decrease iodide transport into the...

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reagent composed of sodium hydride and an alkali metal iodide (NaH⋅MI, M = Li, Na). Although not commercially significant sodium hydride has been proposed...

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