Calcium sulfate wani sinadari ne wanda ya ƙunshi calcium, sulfur, da oxygen, tare da tsarin sinadarai CaSO4. Yana faruwa a zahiri a matsayin gypsum ma'adinai, wanda aka saba amfani dashi a cikin kayan gini da kuma matsayin kwandishan ƙasa. Calcium sulfate kuma ana amfani da shi a masana'antu iri-iri da aikace-aikacen sarrafa abinci, ciki har da matsayin coagulant wajen samar da tofu, a matsayin wakili mai ƙarfi a cikin wasu cuku da kayan gasa, da kuma wani ɓangaren plaster na Paris.