What is a Calcium sulfate (CaSO₄)?

Calcium sulfate (CaSO₄) is an inorganic compound consisting of calcium and sulfate. It typically appears as a colorless or white crystalline powder. In nature, it is widely known as gypsum, with the chemical formula CaSO₄·2H₂O, indicating a hydrated form containing water. Calcium sulfate is highly stable and is nearly insoluble in most solvents, although it dissolves slightly in water. This compound finds applications across a range of industries, including construction, pharmaceuticals, agriculture, and food.

In the construction industry, calcium sulfate is primarily used in the form of gypsum board and plaster, playing a key role as a building material. In pharmaceuticals, it serves as a calcium source and is sometimes used in treatments for conditions such as osteoporosis. In agriculture, calcium sulfate is used as a soil conditioner to improve soil structure, adjust pH, and provide calcium. The food industry also uses it as a coagulant or additive. Additionally, calcium sulfate is employed as a desiccant to control humidity.

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