Mercury(I) oxide

Mercury(I) oxide, also known as mercurous oxide, is an inorganic metal oxide with the chemical formula Hg2O.

Mercury(I) oxide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.036.289
EC Number
  • 239-934-0
UNII
Properties
Hg2O
Molar mass 417.183 g·mol−1
Appearance Very dark, orange, opaque crystals
Odor Odourless
Density 9.8 g mL−1
−76.3·10−6 cm3/mol
Hazards
Main hazards highly toxic
T+ Xn N
NFPA 704 (fire diamond)
Flammability code 0: Will not burn. E.g. waterHealth code 4: Very short exposure could cause death or major residual injury. E.g. VX gasReactivity code 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
0
4
1
Lethal dose or concentration (LD, LC):
18 mg/kg (oral, rat)[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

It is a brown/black powder, insoluble in water, toxic but without taste or smell. It is chemically unstable and converts to mercury(II) oxide and mercury metal.

References
  1. Chambers, Michael. "ChemIDplus - 15829-53-5 - RPZHFKHTXCZXQV-UHFFFAOYSA-N - Mercurous oxide - Similar structures search, synonyms, formulas, resource links, and other chemical information". Chem.nlm.nih.gov. Retrieved 2 April 2019.


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