| IUPAC name
| Other names
|Molar mass||232.66 g/mol|
|Appearance|| Red solid (α-HgS)|
Black solid (β-HgS)
|Melting point||580 °C (1,076 °F; 853 K) (decomposes)|
Std enthalpy of
|Safety data sheet||Sigma-Aldrich|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 .
Mercury sulfide is resistant to the attack of most reagents.
However, mercury sulfide in cinnabar form will burn when ignited in air, releasing sulfur dioxide and mercury vapors, which are very toxic.
- HgS + O2 → Hg + SO2
Mercury sulfide is a solid, virtually insoluble in water and all solvents.
Cinnabar can be purchased from various mineral suppliers. In some countries its sale may be regulated.
- Mineral collecting
- Make elemental mercury (VERY DANGEROUS)
Cinnabar is toxic and should be handled with proper protection.
In closed containers.
Should be take to disposal centers.