Calcium sulfate
Catalog Number
ACM7778189
CAS
7778-18-9
IUPAC Name
Calcium;sulfate
Synonyms
Anhydrite
Application
Calcium sulfate serves multiple purposes across various industries due to its versatile properties. Available as both anhydrous and dihydrate forms, it is derived through processes involving gypsum. In its anhydrous form, it contains about 29% calcium, while the dihydrate form contains approximately 23%. In the food industry, calcium sulfate is commonly used as a filler and in baking powder standardization. It acts as a firming agent in canned vegetables such as potatoes and carrots, and enhances dough quality by providing calcium ions which prevent stickiness and improve bread texture. Additionally, it helps in producing dryness and stiffness in soft-serve ice cream and forms dessert gels when reacting with alginates. Its role as a calcium source makes it integral in food enrichment processes. Beyond food applications, calcium sulfate is utilized in cements, tiles, and plaster, serves as a soil conditioner, and is involved in the production of paints, dyes, and polishes. It is also a byproduct of numerous chemical reactions, further broadening its industrial utility. Notably, calcium sulfate is used in traditional blackboard chalk and is recognized as a calcium salt with a distinct grayish-white, dense powder appearance.
Molecular Weight
136.14
Molecular Formula
CaO4S
Product Information
Description
Calcium sulfate appears as odorless, white powder or colorless, crystalline solid. Crystals sometimes have a blue, gray or reddish tinge or can be brick red. Density: 2.96 g cm-3.;DryPowder; DryPowder, OtherSolid; DryPowder, PelletsLargeCrystals; Liquid; OtherSolid; PelletsLargeCrystals; PelletsLargeCrystals, Liquid; WetSolid;Fine, white to slightly yellowish-white odourless powder;WHITE HYGROSCOPIC POWDER OR CRYSTALLINE POWDER.;Odorless, white powder or colorless, crystalline solid.;Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge.]
Canonical SMILES
[O-]S(=O)(=O)[O-].[Ca+2]
InChI
InChI=1S/Ca.H₂O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
InChI Key
OSGAYBCDTDRGGQ-UHFFFAOYSA-L
Boiling Point
Decomposes (NIOSH, 2016);Decomposes;Decomposes
Melting Point
1450 °C
Purity
99%+
Density
2.9 g/cm³
Solubility
Soluble in water
Appearance
White powder
Storage
Room Temperature
Complexity
62.2
Covalently-Bonded Unit Count
2
Exact Mass
135.9143205
Heavy Atom Count
6
MDL Number
MFCD00010912
Monoisotopic Mass
135.9143205
Odor
Odorless
Refractive Index
INDEX OF REFRACTION: 1.569, 1.575, 1.613
Rotatable Bond Count
0
Topological Polar Surface Area
88.6 Ų
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