Mercury (I) oxide

from Wikipedia, the free encyclopedia
General
Surname Mercury (I) oxide
other names
  • Mercury Oxide (obsolete)
  • Mercury monoxide
Molecular formula Hg 2 O
Brief description

black solid

External identifiers / databases
CAS number 15829-53-5
EC number 239-934-0
ECHA InfoCard 100.036.289
PubChem 16683011
Wikidata Q172411
properties
Molar mass 417.18 g mol −1
Physical state

firmly

density

9.9 g cm −3

Melting point

100 ° C (decomposition)

safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
06 - Toxic or very toxic 08 - Dangerous to health 09 - Dangerous for the environment

danger

H and P phrases H: 330-310-300-373-410
P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Mercury (I) oxide (Mercury oxide) Hg 2 O is an unstable chemical compound and, in addition to mercury (II) oxide, one of the two oxides of mercury .

Extraction and presentation

Mercury (I) oxide is formed when mercury (I) nitrate reacts with potassium hydroxide . At first the unstable mercury (I) hydroxide Hg 2 (OH) 2 is formed . This breaks down to mercury (I) oxide, splitting off water.

properties

Mercury (I) oxide is very unstable and decomposes to elemental mercury and mercury (II) oxide when exposed to light or heat.

The compound is insoluble in water, but it is soluble in nitric acid .

Individual evidence

  1. ↑ a b c entry at web elements
  2. ^ Entry on inorganic mercury compounds in the GESTIS substance database of the IFA , accessed on February 1, 2016 (JavaScript required)
  3. ↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling falls under the group entry inorganic compounds of mercury with the exception of mercuric sulphide and those specified elsewhere in this Annex in the Classification and Labeling Inventory of European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
  4. ^ A b A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1503.
  5. ↑ Entry on mercury oxides. In: Römpp Online . Georg Thieme Verlag, accessed on May 25, 2014.