Sodium iodide

Sodium iodide
Sodium iodide
Sodium iodide
Sodium iodide
Sodium iodide

NaI(Tl) scintillators
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.028.800 Edit this at Wikidata
RTECS number
  • WB6475000
UNII
  • 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
  • [Na+].[I-]
Properties
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]
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]
−57×10−6 cm3 mol−1[6]
1.93 (300 nm)
1.774 (589 nm)
1.71 (10 μm)[7]
Structure[8]
Halite, cF8
Fm3m, No. 225
a = 0.6462 nm
4
Octahedral
Thermochemistry[9]
52.1 J mol−1 K−1
98.5 J mol−1 K−1
−287.8 kJ mol−1
−286.1 kJ mol−1
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Irritant, can harm the unborn child
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
Danger
H315, H319, H400
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).
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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).