Mercury sulfide
| Names | |
|---|---|
| IUPAC name
Mercury sulfide
| |
| Other names
Cinnabar
Mercuric sulfide Mercury sulphide Mercury(II) sulfide Vermilion | |
| Properties | |
| HgS | |
| Molar mass | 232.66 g/mol |
| Appearance | Red solid (α-HgS) Black solid (β-HgS) |
| Odor | Odorless |
| Density | 8.10 g/cm3 |
| Melting point | 580 °C (1,076 °F; 853 K) (decomposes) |
| Boiling point | Decomposes |
| Insoluble | |
| Solubility | Insoluble in organic solvents |
| Vapor pressure | ~0 mmHg |
| Thermochemistry | |
| Std molar
entropy (S |
78 J·mol−1·K−1 |
| Std enthalpy of
formation (ΔfH |
−58 kJ·mol−1 |
| Hazards | |
| Safety data sheet | Sigma-Aldrich |
| Related compounds | |
| Related compounds
|
Mercury(II) sulfate |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Mercury sulfide, also known as mercury(II) sulfide or mercuric sulfide is a chemical compound composed with the formula HgS. It occurs naturally as the mineral cinnabar .
Contents
Properties
Chemical
Mercury sulfide is resistant to the attack of most reagents, such as acids and bases.
However, mercury sulfide in cinnabar form will burn when ignited in air, releasing sulfur dioxide and mercury vapors, which are very toxic and corrosive to many metals, like aluminium.[1]
- HgS + O2 → Hg + SO2
Physical
Mercury sulfide is a red or black solid, virtually insoluble in water and all solvents.
Availability
Cinnabar can be purchased from various mineral suppliers. In some countries its sale may be regulated.
Preparation
Mercury(II) sulfide can be created by adding elemental sulfur to mercury metal. Mercury sulfide is the result of mercury neutralization.
Projects
- Mineral collecting
- Make elemental mercury (VERY DANGEROUS)
Handling
Safety
Cinnabar is toxic and should be handled with proper protection.
Storage
In closed containers.
Disposal
Should be take to disposal centers.
