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Mercury sulfide, or mercury(II) sulfide is a chemical compound composed of the chemical elements mercury and sulfur. It is represented by the chemical formula HgS. It is virtually insoluble in water.
Metacinnabar is a black-colored form of mercury(II) sulfide, which crystallizes in the cubic crystal system. [42] Synthetic cinnabar is produced by treatment of mercury(II) salts with hydrogen sulfide to precipitate black, synthetic metacinnabar, which is then heated in water. This conversion is promoted by the presence of sodium sulfide.
Mercury(I) sulfide or mercurous sulfide is a hypothetical chemical compound of mercury and sulfur, with elemental formula Hg 2 S.Its existence has been disputed; it may be stable below 0 °C or in suitable environments, but is unstable at room temperature, decomposing into metallic mercury and mercury(II) sulfide (mercuric sulfide, cinnabar).
Sulfide (also sulphide in British English) [2] is an inorganic anion of sulfur with the chemical formula S 2− or a compound containing one or more S 2− ions. Solutions of sulfide salts are corrosive. Sulfide also refers to large families of inorganic and organic compounds, e.g. lead sulfide and dimethyl sulfide.
The cinnabar ore, known also as mercury sulfide (84 parts mercury to 16 parts sulfur), was treated in furnaces and retorts near the mine. The essential refining method was to turn the mercury into gas and recondense it to quicksilver.
Mercury is released into the air from taconite mining and other industries, and exists in multiple forms. Its most toxic form, methylmercury, accumulates in fish, causing serious health issues if ...
As for how much mercury is dangerous, the exact number is up for debate. Per Ciarametaro, tissue concentration of 100 ng/mL of methylmercury or greater is commonly considered 'high'.
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.