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Chemical compound From Wikipedia, the free encyclopedia
Mercury(I) oxide, also known as mercurous oxide, is an inorganic metal oxide with the chemical formula Hg2O.
This article needs additional citations for verification. (August 2014) |
Identifiers | |
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3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.036.289 |
EC Number |
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PubChem CID |
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UNII | |
UN number | 1641 |
CompTox Dashboard (EPA) |
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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 | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
highly toxic |
GHS labelling:[2] | |
Danger | |
H315, H317, H320, H335, H341, H361, H370, H372 | |
P201, P202, P260, P261, P264, P270, P271, P272, P280, P281, P302+P352, P304+P340, P305+P351+P338, P307+P311, P308+P313, P312, P314, P321, P332+P313, P333+P313, P337+P313, P362, P363, P403+P233, P405, P501 | |
NFPA 704 (fire diamond) | |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
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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It is a brown/black powder, insoluble in water but soluble in nitric acid. With hydrochloric acid, it reacts to form calomel, Hg2Cl2.[4] Mercury(I) oxide is toxic but without taste or smell. It is chemically unstable and converts to mercury(II) oxide and mercury metal.
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