The compound with the chemical formula CaS is known as Calcium Sulfide.
Calcium Sulfide is an inorganic compound composed of calcium and sulfur. It is a white solid that is insoluble in water but reacts with it to produce hydrogen sulfide gas. This compound is commonly used in the production of luminous paints, as a flotation agent in mineral processing, and in the preparation of other sulfur-containing compounds.
In its natural form, Calcium Sulfide can be found in some minerals, but it is usually synthesized for industrial use. The chemical reaction to produce Calcium Sulfide typically involves heating calcium sulfate with carbon, which reduces the sulfate to sulfide.