Mercury(II) iodide
Mercury(II) iodide (also known as mercuric iodide) is a chemical compound with the formula HgI2. It is used in various applications, including medical imaging, photovoltaics, and as a laboratory reagent.
Chemical Properties
Mercury(II) iodide is an inorganic compound that is bright red in its alpha crystalline form. It is one of the few compounds that have a color resulting from sublimation. The compound changes color when subjected to light, a property known as photochromism.
Synthesis
Mercury(II) iodide can be synthesized by reacting mercury(II) chloride with potassium iodide. The reaction produces a precipitate of mercury(II) iodide, which can be collected and purified.
Uses
Mercury(II) iodide has several uses in various fields. In medicine, it is used in X-ray imaging, where it serves as a contrast agent. In photovoltaics, it is used in the manufacture of solar cells. In the laboratory, it is used as a reagent in various chemical reactions.
Safety
Mercury(II) iodide is toxic if ingested or inhaled, and it can cause harm to the skin and eyes. It is also harmful to aquatic life. Proper safety measures should be taken when handling this compound.
See Also
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