Strontium iodide

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Strontium iodide
Strontium-iodide-unit-cell-3D-balls.png
Identifiers
CAS number10476-86-5 (anhydrous) YesY
PubChem25304
EC number233-972-1
RTECS numberWK9275000
Jmol-3D imagesImage 1
Properties
Molecular formulaSrI2 (anhydrous)
SrI2·6H2O (hexahydrate)
Molar mass341.43 g/mol (anhydrous)
AppearanceColorless to white crystalline plates
Density4.55 g/cm³ (anhydrous)[1]
4.40 g/cm³ (hexahydrate)[1]
Melting point507-645°C [2]
Boiling point1773 °C (decomp)
Solubility in water177.0 g/100 mL (20°C)[3]
Solubility in ethanol3.1 g/100 ml (4°C) [3]
Structure
Crystal structureOrthorhombic, oP24
Space groupPbca, No. 61
Hazards
R-phrasesR14 R34
S-phrasesS22 S26 S27 S36/37/39S45 [4]
Main hazardsCorrosive
NFPA 704
Related compounds
Other anionsstrontium fluoride
strontium chloride
strontium bromide
Other cationsberyllium iodide
magnesium iodide
calcium iodide
barium iodide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
Infobox references
 
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Strontium iodide
Strontium-iodide-unit-cell-3D-balls.png
Identifiers
CAS number10476-86-5 (anhydrous) YesY
PubChem25304
EC number233-972-1
RTECS numberWK9275000
Jmol-3D imagesImage 1
Properties
Molecular formulaSrI2 (anhydrous)
SrI2·6H2O (hexahydrate)
Molar mass341.43 g/mol (anhydrous)
AppearanceColorless to white crystalline plates
Density4.55 g/cm³ (anhydrous)[1]
4.40 g/cm³ (hexahydrate)[1]
Melting point507-645°C [2]
Boiling point1773 °C (decomp)
Solubility in water177.0 g/100 mL (20°C)[3]
Solubility in ethanol3.1 g/100 ml (4°C) [3]
Structure
Crystal structureOrthorhombic, oP24
Space groupPbca, No. 61
Hazards
R-phrasesR14 R34
S-phrasesS22 S26 S27 S36/37/39S45 [4]
Main hazardsCorrosive
NFPA 704
Related compounds
Other anionsstrontium fluoride
strontium chloride
strontium bromide
Other cationsberyllium iodide
magnesium iodide
calcium iodide
barium iodide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
Infobox references

Strontium iodide (SrI2) is a salt of strontium and iodine. It is an ionic, water-soluble, and deliquescent compound that can be used in medicine as a substitute for potassium iodide .[5]

Reactions[edit]

Strontium iodide can be prepared by reacting strontium carbonate with hydroiodic acid:

SrCO3 + 2 HI → SrI2 + H2O + CO2

Strontium iodide yellows when exposed to air. At high temperatures (when in the presence of air) strontium iodide completely decomposes to form strontium oxide and free iodine.[6]

References[edit]

  1. ^ a b Yaws, C.L. (2008). Thermophysical properties of chemicals and hydrocarbons. William Andrew. ISBN 978-0-8155-1596-8. 
  2. ^ Turner, Jr., Francis M., ed. (1920), The Condensed Chemical Dictionary, New York: The Chemical Catalog Company, p. 449, retrieved 2007-12-10 
  3. ^ a b
    177 g/100 mL (20 °C) Seidell, Atherton (1907), Solubilities of Inorganic and Organic Substances, New York: D. Van Nostrand, p. 318, retrieved 2007-12-10 
  4. ^ 400696 Strontium iodide anhydrous, beads, −10 mesh, 99.99+ %
  5. ^ Shoemaker, John V. (1908), A Practical Treatise on Materia Medica and Therapeutics (7th ed.), Philadelphia: F. A. Davis, p. 854, retrieved 2007-12-10 
  6. ^ Bartley, Elias H. (1898), Text-book of Medical and Pharmaceutical Chemistry (5th ed.), Philadelphia: P. Blakiston, pp. 267–268, retrieved 2007-12-10