 | This articleneeds additional citations forverification. Please helpimprove this article byadding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Mercury(I) oxide" – news ·newspapers ·books ·scholar ·JSTOR(August 2014) (Learn how and when to remove this message) |
| Identifiers | |
|---|---|
3D model (JSmol) | |
| ChemSpider |
|
| ECHA InfoCard | 100.036.289 |
| EC Number |
|
| UNII | |
| UN number | 1641 |
| |
| 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:[3] | |
  | |
| 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)[2] |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Mercury(I) oxide, also known asmercurous oxide, is an inorganic metal oxide with the chemical formula Hg2O.
It is a brown/black powder, insoluble in water but soluble innitric acid. Withhydrochloric acid, it reacts to form calomel,Hg2Cl2.[4] Mercury(I) oxide is toxic but without taste or smell. It is chemically unstable and converts tomercury(II) oxide andmercury metal.
