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Mercuric oxide

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Identification
Molecular formula
HgO
CAS number
21908-53-2
IUPAC name
oxomercury
State
State

Mercuric oxide is a solid at room temperature.

Melting point (Celsius)
-38.83
Melting point (Kelvin)
234.32
Boiling point (Celsius)
356.70
Boiling point (Kelvin)
629.85
General information
Molecular weight
216.59g/mol
Molar mass
216.5920g/mol
Density
11.1400g/cm3
Appearence

Mercuric oxide appears as a red or orange-yellow, odorless, crystalline solid. It is commonly available in two forms: a finely divided orange, or red crystalline powder. The color depends on the particle size and the method of production. The red form is obtained by heating mercury in air, while the yellow form is obtained by precipitation from a mercury(II) salt solution.

Comment on solubility

Solubility of Oxomercury

Oxomercury, commonly referred to as mercuric oxide, is known for its intriguing solubility characteristics. In terms of solubility in water, oxidized mercury compounds can exhibit variable behavior depending on certain conditions.

Key Points About Solubility:

  • Low Solubility: Oxomercury is generally considered to have low solubility in water. This can be attributed to its ionic bonding and solid-state lattice structure.
  • Influence of pH: The solubility may increase in acidic conditions due to the formation of soluble mercury complexes, while it is significantly lower in neutral or basic conditions.
  • Temperature Dependence: Like many compounds, the solubility of oxomercury can change with temperature. Higher temperatures tend to increase solubility, though for oxomercury, the increase is usually modest.

To illustrate its behavior further, one might say:

"In the realm of chemical solubility, oxomercury presents an enigma, demonstrating how intricate factors can influence dissolution."

In conclusion, oxomercury's solubility is characterized by its low water solubility with nuances that depend heavily on environmental conditions. Understanding these factors is crucial for applications in chemistry and related fields.

Interesting facts

Interesting Facts About Oxomercury

Oxomercury, often referred to as mercury(II) oxide, is a fascinating compound that embodies the intricate relationship between chemistry and its applications. Here are some intriguing insights into this compound:

  • Historical Significance: Mercury itself has been known since ancient times and was often associated with alchemy. The discovery of its oxide form has paved the way for numerous industrial applications.
  • Dual Nature: Oxomercury exhibits both oxidizing and reducing properties, making it a versatile compound in various chemical reactions. It can act as an oxidizer in certain processes while also being involved in reduction reactions.
  • Applications in Medicine: Historically, compounds of mercury were used in traditional medicine, although this practice has declined due to safety concerns. Today, understanding oxomercury helps in the development of safer alternatives.
  • Environmental Impact: Mercury compounds, including oxomercury, are scrutinized due to their potential environmental and health risks. Studies focus on their behaviors in ecosystems and methods to mitigate their impact.
  • Analytical Chemistry: Oxomercury has been utilized in various analytical techniques, allowing scientists to explore and quantify the presence of mercury in different samples.

In summary, oxomercury stands at the intersection of chemistry, history, and environmental science. Its diverse properties and applications make it a subject of ongoing study and consideration.

Synonyms
MERCURIC OXIDE
21908-53-2
Mercury(II) oxide
Mercuric oxide, red
oxomercury
Mercuric oxide red
Red mercuric oxide
Santar
Mercury oxide (HgO)
Red Precipitate
Mercuric oxide, yellow
Santar M
Yellow precipitate
Natural montroydite
Mercury(2+) oxide
Red oxide of mercury
Gelbes quecksilberoxyd
Hydrargyrum oxid flav
Yellow mercuric oxide
Mercuric oxide (red)
Oxide mercurique jaune
Mercuric oxide (HgO)
Caswell No. 544A
Yellow oxide of mercury
Oxido amarillo de mercurio
Oxyde de mercure
EPA Pesticide Chemical Code 052102
CI 77760
C.I. 77760
DTXSID4042125
IY191986AO
RefChem:6001
DTXCID2022125
244-654-7
Mercurius Praecipitatus Ruber
mercury(II)oxide
Oxyde mercurique
Mercuric(II) oxide red
12653-71-3
Mercuric oxide yellow
Mercury(II) oxide red
Mercury monoxide
EINECS 244-654-7
Hydrargyrum oxydatum rubrum
Oxyde de mercure [French]
Quecksilberoxyd
UNII-IY191986AO
Oxyde mercurique [ISO-French]
HSDB 1265
oxido de mercurio
ossido di mercurio
mercury (II)oxide
UN1641
mercury (II) oxide
mercury-(II)-oxide
AI3-02738
mercury (II) oxide red
Mercury(II) oxide, red
Mercury (II) oxide yellow
Mercury(II) oxide, yellow
Mercury(II) oxide, 98%
SCHEMBL60790
Mercuric oxide, yellow [NF]
Mercury(II) oxide red, ACS reagent
AKOS015903278
Mercury oxide [UN1641] [Poison]
FM44545
BP-30081
Mercuric(II) oxide yellow, A.C.S. reagent
Mercury(II) oxide red, ACS reagent, >=99.0%
Mercury(II) oxide, 99.999% trace metals basis
Mercury(II) oxide, p.a., ACS reagent, 99.0%
Q174727
Mercury(II) oxide yellow, ACS reagent, >=99.0%
Mercury(II) oxide yellow, p.a., ACS reagent, 99.0%