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Sodium Iodide |
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sodium iodide [′sōd·ē·əm ′ī·ə‚dīd]
(inorganic chemistry) NaI A white, air-sensitive powder, deliquescent, with bitter taste; soluble in water, alcohol, and glycerin; melts at 653°C; used in photography and in medicine and as an analytical reagent. Sodium Iodide Nal, a salt; colorless crystals. Density, 3.665 g/cm3; melting point, 662°C. Upon prolonged exposure to light, it turns yellow because of oxidation by atmospheric oxygen and liberation of free iodine. Sodium iodide is hygroscopic. Solubility in water, 64.1 percent at 20°C and 75.1 percent at 100°C. At ordinary temperature, NaI · 2H2O crystallizes from aqueous solutions. Sodium iodide is obtained by means of an exchange reaction between Fe3 I8 and Na2CO3 and is used for medicinal purposes as an iodine preparation. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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