Mercury(I) oxide

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Mercury(I) oxide
15829-53-5 N[1]
ChemSpider 17615579 YesY
EC Number 239-934-0
Jmol interactive 3D Image
PubChem 16683011
Molar mass 417.18 g·mol−1
Appearance Very dark, orange, opaque crystals
Odor Odourless
Density 9.8 g mL−1
Lethal dose or concentration (LD, LC):
18 mg/kg (oral, rat)[3]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

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

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.