Mercuric iodide

Mercuric iodide or mercury(II) iodide is a chemical compound with the formula HgI2. It is used in various applications, including medical imaging, photovoltaic cells, and as a laboratory reagent.

Chemical Properties

Mercuric iodide is an inorganic compound that is bright red in color. It is a heavy, odorless powder that is not soluble in water. The compound is formed by the reaction of mercury and iodine. It has a tetragonal crystal structure and is one of the few materials that have a negative temperature coefficient of solubility, meaning it becomes less soluble in water as the temperature increases.

Uses

Mercuric iodide has several uses in different fields. In medicine, it is used in X-ray imaging. The compound is used in the manufacture of photovoltaic cells due to its unique optical properties. In the laboratory, mercuric iodide is used as a reagent in various chemical reactions.

Health Effects

Exposure to mercuric iodide can have serious health effects. It is toxic if inhaled, ingested, or comes into contact with the skin. Long-term exposure can lead to mercury poisoning, which can cause a range of symptoms including tremors, insomnia, memory loss, and mental disturbances.

Safety

Due to its toxicity, mercuric iodide should be handled with care. It should be stored in a cool, dry place away from sources of heat or ignition. Protective clothing, gloves, and eye protection should be worn when handling the compound.

See Also

• Mercury (element)
• Iodine
• Mercury poisoning