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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.
The element is then dissolved in a mildly alkaline solution in the standard manner, to produce 131 I as iodide and hypoiodate (which is soon reduced to iodide). [13] 131 I is a fission product with a yield of 2.878% from uranium-235, [14] and can be released in nuclear weapons tests and nuclear accidents.
The sodium/iodide cotransporter, also known as the sodium/iodide symporter (NIS), [5] is a protein that in humans is encoded by the SLC5A5 gene. [6] [7] [8] It is a transmembrane glycoprotein with a molecular weight of 87 kDa and 13 transmembrane domains, which transports two sodium cations (Na +) for each iodide anion (I −) into the cell. [9]
Cesium iodide (CsI) in crystalline form is used as the scintillator for the detection of protons and alpha particles. Sodium iodide (NaI) containing a small amount of thallium is used as a scintillator for the detection of gamma waves and zinc sulfide (ZnS) is widely used as a detector of alpha particles. Zinc sulfide is the material Rutherford ...
In the classic Finkelstein reaction, an alkyl chloride or an alkyl bromide is converted to 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 not. [29] The reaction is driven toward products by mass action due to the precipitation of the ...
For example, in the molecules represented by CH 3 X, where X is a halide, the carbon-X bonds have strengths, or bond dissociation energies, of 115, 83.7, 72.1, and 57.6 kcal/mol for X = fluoride, chloride, bromide, and iodide, respectively. [2] Of the halides, iodide usually is the best leaving group.
Sodium salts of long chain sulfonic acids (e.g. sodium lauryl sulfate) ... sodium bromide, sodium iodide, sodium sulfate, sodium bicarbonate and sodium carbonate.
Iodine-125 is commercially available in dilute NaOH solution as 125 I-iodide (or the hypohalite sodium hypoiodite, NaIO). The radioactive concentration lies at 4 to 11 GBq/mL and the specific radioactivity is > 75 GBq/μmol (7.5 × 10 16 Bq/mol). The chemical and radiochemical purity is high.