1.0 2010-04-08 22:11:49 UTC 2025-11-19 00:54:46 UTC FDB015402 Calcium sulfate It is used in foods as an anticaking agent, colouring adjunct, dough strengthener, drying agent, firming agent, formulation aid, leavening agent, nutrient supplement, pH control agent, processing aid, stabiliser, thickener, synergist and texturiser; also used as an additive in the bleaching of flour by benzoyl peroxide Calcium sulfate is a common component of fouling deposits in industrial heat exchangers. It is because its solubility decreases with increasing temperature in hot water (see the figure).; Calcium sulfate is a common laboratory and industrial chemical. In the form of ?-anhydrite (the nearly anhydrous form), it is used as a desiccant. It is also used as a coagulant in products like tofu. In the natural state, unrefined calcium sulfate is a translucent, crystalline white rock. When sold as a color-indicating variant under the name Drierite, it appears blue or pink due to impregnation with cobalt chloride, which functions as a moisture indicator. The hemihydrate (CaSO4.~0.5H2O) is better known as plaster of Paris, while the dihydrate (CaSO4.2H2O) occurs naturally as gypsum. The anhydrous form occurs naturally as ?-anhydrite. Depending on the method of calcination of calcium sulfate dihydrate, specific hemihydrates are sometimes distinguished: alpha-hemihydrate and beta-hemihydrate. They appear to differ only in crystal size. Alpha-hemihydrate crystals are more prismatic than beta-hemihydrate crystals and, when mixed with water, form a much stronger and harder superstructure. Anhydrite Anhydrous calcium sulfate Anhydrous gypsum Anhydrous sulfate of lime Basic calcium sulfate Calc Sulph Pwr 6x Calc sulph schuessler cell salt homaccord Calcarea Sulfurica 2ch-30ch Calcarea Sulph 6x Calcarea sulphurica Calcined gypsum Calcium sulfate (1:1) Calcium sulfate (CaSO4) Calcium sulfate (NF) Calcium Sulfate Liquid (S#114) Calcium sulfate, anhydrous Calcium sulfuricum Calcium Sulfuricum-Injeel Forte Liq (6d,12d,30d,200d/1.1ml) Calcium sulphate Calcium sulphate, natural CaSO4 Crysalba Drierite Drierite(r) E516 Exsiccated gypsum Exsiccated gypsum (JP15) Franklin Fiber H 45 GIBS Gypsum Gypsum (JP15) Gypsum fibrosum Gypsum fibrosum (TN) Kalziumsulfat Karstenite Muriacite Natural anhydrite Oparex 10 Osteoset Pigment white 25 Plaster of paris Plaster of paris, anhydrite S3 Calcarea Sulphurica Satin white SSS-a Sulfuric acid calcium salt, 8CI Sulfuric acid, calcium salt Sulfuric acid, calcium salt (1:1) Sulfuric acid, calcium salt (van) Surfuric acid calcium(2+) salt (1:1) Terra alba Thiolite CaO4S 136.141 135.914320333 calcium sulfate calcium sulfate 7778-18-9 [Ca++].[O-]S([O-])(=O)=O InChI=1S/Ca.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2 OSGAYBCDTDRGGQ-UHFFFAOYSA-L belongs to the class of inorganic compounds known as alkaline earth metal sulfates. These are inorganic compounds in which the largest oxoanion is sulfate, and in which the heaviest atom not in an oxoanion is an alkaline earth metal. Alkaline earth metal sulfates Inorganic compounds Mixed metal/non-metal compounds Alkaline earth metal oxoanionic compounds Alkaline earth metal sulfates Inorganic calcium salts Inorganic oxides Alkaline earth metal sulfate Inorganic calcium salt Inorganic oxide Inorganic salt calcium salt melting_point Mp 1570° logp -0.84 ChemAxon pka_strongest_acidic -3 ChemAxon iupac calcium sulfate ChemAxon average_mass 136.141 ChemAxon mono_mass 135.914320333 ChemAxon smiles [Ca++].[O-]S([O-])(=O)=O ChemAxon formula CaO4S ChemAxon inchi InChI=1S/Ca.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2 ChemAxon inchikey OSGAYBCDTDRGGQ-UHFFFAOYSA-L ChemAxon polar_surface_area 80.26 ChemAxon refractivity 11.53 ChemAxon polarizability 5.81 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 4 ChemAxon donor_count 0 ChemAxon physiological_charge -2 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 1310233 Specdb::MsMs 1310234 Specdb::MsMs 1310235 31346 odorless