Calcium Sulfate


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Related to Calcium Sulfate: calcium sulfate hemihydrate, Calcium sulfate dihydrate

calcium sulfate

[′kal·se·əm ′səl‚fāt]
(inorganic chemistry)
CaSO4 A white crystalline salt, insoluble in water; used in Keene's cement, in pigments, as a paper filler, and as a drying agent.
Either of two hydrated forms of the salt: the dihydrate, CaSO4·2H2O, and the hemihydrate, CaSO4·½H2O.

Calcium Sulfate

 

CaSO4, a salt, existing in nature as the dihydrate CaSO4-2H2O (gypsum, selenite) and in an anhydrous state (anhydrite). Anhydrous calcium sulfate occurs in the form of colorless crystals with a density of 2.96 g/cm3 and a melting point of 1450°C. It combines very slowly with water, exhibiting a poor solubility of 0.2036 g per 100 g H2O at 20°C and 0.067 g at 100°C. The half-hydrate CaSO4-1/2 H2O is known; when mixed with water, it hardens rapidly, converting into CaSO«2H2O. Calcium sulfate is used in the manufacture of figures and casts, as a construction material, and in medicine.

calcium sulfate

Anhydrite or gypsum dihydrate which has been calcined to the point at which all the water of crystallization has been removed.
References in periodicals archive ?
The minerals combined with sulfur either leached from the rocks or introduced as volcanic gas, and was deposited as calcium sulfate into an underground fracture that later became exposed at the surface.
Traditional calcium sulfate products, including BioLok's regular BoneGen, are considered very technique-sensitive and are used mainly for filling small voids and as an additive to more expensive bone augmentation products to "stretch" the volume, reduce overall cost and enhance bone formation.
AlloMatrix(TM) delivers the highest available concentration of demineralized bone matrix (86% by volume) in a bioactive carrier medium of surgical grade calcium sulfate.
Calcium Sulfate has been used safely for over 30 years as a bone augmentation material to fill small voids.
In the FDA-reviewed preclinical studies, OSTEOSET(R) pellets with DBM formed natural bone architecture more rapidly than OSTEOSET(R) calcium sulfate pellets alone.
Lot 220: Concrete Work - 10 300 mA impact sound insulation 15-20 mm; : - 9 800 mA thermal insulation layer 50-85 mm; : - 1 000 mA compensation insulation; : - 4000 mA bound, pressure and stable bed for cable trays; : - 9 800 mA swimming cement screed; : - 1500 mA A heated screed, cement screed; : - 3 300 mA calcium sulfate screed; : - 200 sqm cement screed as a topping.
OSTEOSET(TM) Bone Graft Substitute is proprietary medical grade calcium sulfate pellets that, compared to current bone graft alternatives such as autologous grafts and allografts, is ideal for bone grafting procedures because it is both biocompatible and bioresorbable.
It is formulated to accept high filler loadings of calcium sulfate, calcium carbonate or other conventional fillers.
Raised floors, floor construction steel substructure with covering of calcium sulfate plates.
Later, Bates (40) found that calcium sulfate was not an effective retarder of set in the absence of Ca[(OH).
2) Average of major brands made using calcium sulfate or gypsum as a coagulant.