Calcium sulfate, represented by the chemical formula CaSO4, is a white crystalline solid that occurs naturally as the mineral gypsum. It is commonly used in construction materials, such as plaster and drywall, due to its ability to harden when mixed with water. In addition to its construction applications, CaSO4 is also utilized in the food industry as a coagulant in tofu production and as a food additive. It plays a role in agriculture as a soil conditioner, helping to improve soil structure and drainage.