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Mercury(II) iodide

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Identification
Molecular formula
HgI2
CAS number
7774-29-0
IUPAC name
iodomercury
State
State

At room temperature, mercury(II) iodide is typically found in a solid state. It exists in the form of synthetic crystalline powder with a red/orange color due to its alpha crystalline structure.

Melting point (Celsius)
259.00
Melting point (Kelvin)
532.00
Boiling point (Celsius)
350.00
Boiling point (Kelvin)
623.00
General information
Molecular weight
454.40g/mol
Molar mass
454.3990g/mol
Density
7.7000g/cm3
Appearence

Mercury(II) iodide is a bright scarlet-red solid in its alpha form. It is practically insoluble in water and changes color to yellow when heated, due to a phase transition to its beta form. This color change is reversible upon cooling. In its natural form, under standard conditions, it is known for its distinct vivid red crystals.

Comment on solubility

Solubility of Iodomercury

Iodomercury, a compound represented by the formula HgI, exhibits intriguing solubility characteristics that are essential to its applications and behavior in various environments.

Key Solubility Features:

  • Solvent Compatibility: Iodomercury is generally sparingly soluble in water. This limited solubility can significantly impact its utility in aqueous reactions or processes.
  • Organic Solvents: The compound tends to dissolve more readily in non-polar organic solvents, making it useful in organic synthesis where polar solvents may not be effective.
  • Temperature Effects: Solubility may vary with temperature, and in many cases, an increase in temperature can enhance the dissolution of solid iodomercury in suitable solvents.

To summarize, while iodomercury displays limited solubility in water, it has greater compatibility with organic solvents, showcasing its versatility. Understanding these solubility traits is vital for employing iodomercury effectively in various chemical processes.

Interesting facts

Interesting Facts about Iodomercury

Iodomercury, a fascinating organomercury compound, has intrigued chemists since its discovery. Known for its unique properties and diverse applications, this compound plays a significant role in various fields. Here are some captivating insights about iodomercury:

  • Composition: Iodomercury is formed by the combination of mercury and iodine, showcasing the interesting chemistry involving heavy metals and halogens.
  • Historical Use: This compound was once widely utilized in the medical field, especially in the production of antiseptics and disinfectants, highlighting its importance in historical public health initiatives.
  • Reactivity: Iodomercury is known for its reactivity and can participate in various chemical reactions, leading to the formation of additional compounds. This makes it an important subject of study in synthetic chemistry.
  • Environmental Concerns: Due to the toxic nature of mercury, iodomercury raises significant environmental and health concerns, prompting chemists to explore safer alternatives in research and industry.
  • Applications in Research: The compound is also used in scientific research, particularly in biological studies where mercury's effect on systems is being investigated.
  • Complex Formation: Iodomercury can form complexes with other molecules, which are crucial in understanding coordination chemistry and the behavior of transition metals.

In summary, the study of iodomercury provides valuable insights into both its practical applications and the broader implications of mercury compounds in chemistry. As the focus on environmental safety escalates, understanding how to manage and utilize such compounds responsibly remains a critical challenge for chemists today.

Synonyms
UNII-HT0935F2JR
HT0935F2JR
HSDB 1220
EINECS 239-409-6
Sore Throat Right Side
239-409-6
Mercurius Iodatus Flavus
Mercurous Iodide
Mercury Protoiodide
Yellow Mercury Iodide
Quecksilberjodur
DTXSID701314265
AKOS015914243
NS00085285
Mercury(I) iodide, purum p.a., yellow, >=99.0% (Hg)