Mercury(II) oxide

Mercury(II) oxide
General
Systematic name	Mercury(II) oxide
Other names	Mercuric oxide
Molecular formula	HgO
Molar mass	216.5894 g/mol
Appearance	Yellow or red solid.
CAS number	[21908-53-2]
Properties
Density and phase	11.14 g/cm3, solid
Solubility in water	N/A
Melting point	500 °C (596 K)
Boiling point	N/A
Basicity (pKb)	N/A
Structure
Coordination geometry	?
Crystal structure	?
Dipole moment	? D
Hazards
MSDS	External MSDS
EU classification	Toxic (T)
R-phrases	Template:R35
S-phrases	Template:S1/2, Template:S26, Template:S37/39, Template:S45
NFPA 704	NFPA 704 safety square 3 1
Flash point	Non-flammable.
Supplementary data page
Structure and properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Mercury(II) oxide, also called mercuric oxide, has a formula of HgO and a formula weight of 216.6. It has a red or orange color. Mercury(II) oxide is a solid at room temperature and pressure.

Uses

HgO is sometimes used in the production of mercury as it decomposes quite easily.

It is also used as a material for anodes for mercury batteries.

mercury i also very dangerous if exposed to prolong exposer. it is known to cause mental retardation and deformation

External links

• National Pollutant Inventory - Mercury and compounds fact sheet
• Information at Webelements.