Calcium sulfate is a chemical compound with the formula CaSO4. It is commonly found in nature as the mineral gypsum, which is used in construction and agriculture. Calcium sulfate appears as a white powder or crystalline solid and is known for its ability to absorb moisture, making it useful as a desiccant. In addition to its applications in building materials, calcium sulfate is also used in food processing as a coagulant in products like tofu. It plays a role in various industrial processes, including the production of plaster and cement, due to its binding properties.