Description
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calcium sulfate

Description
Product Name
calcium sulfate
CAS No.
99400-01-8
Chemical Name
calcium sulfate
Synonyms
CALCIUM SULFATE;Calcium Sulfate Fcc;calcium sulfate for tofu
CBNumber
CB82130352
Molecular Formula
CaO4S
Formula Weight
136.14
MOL File
99400-01-8.mol
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calcium sulfate Property

Melting point:
>300°C
storage temp. 
Hygroscopic, Room Temperature, under inert atmosphere
solubility 
Water (Slightly)
form 
Solid
color 
Off-White to Pale Grey
Solubility Product Constant (Ksp)
pKsp: 4.31
Dielectric constant
5.6(0.0℃)
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Hazard and Precautionary Statements (GHS)

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calcium sulfate Chemical Properties,Usage,Production

Description

Calcium sulfate is a grayish-white dense powder that occurs in nature in both an anhydrous form (anhydrite) and hydrated form(gypsum); it is also the byproduct of many chemical reactions. It has many industrial uses;for example, as a source of sulfur and sulfuric acid,in cements, tiles and plaster,as a soil conditioner, in paints, dyes,and polishes, and as a food additive.

Uses

Calcium Sulfate is most often used as “gypsum” which is the dihydrate. In the form of b-anhydrite (the nearly anhydrous form), it is used as a desiccant. It is also used as a coagulant in products like “tofu”, which is a “bean curd”. When sold as a colorindicating variant under the name “Drierite ”, it appears blue or pink due to impregnation with cobalt chloride, which functions as a moisture indicator. In its natural state, unrefined calcium sulfate is a translucent, crystalline white rock. Many forms are known, including “Alabaster” and “Gypsum”. Selenite, Satin spar, Desert rose, and Gypsum flower are four varieties of Gypsum minerals; all four varieties are crystalline. The four “crystalline” varieties of gypsum are sometimes grouped together and called selenite. All have the same chemical formulation, CaSO4·2H2O. All varieties of gypsum are very soft minerals (hardness: 2 on Mohs scale). This is the most important identifying characteristic of gypsum.

Uses

Pharmaceutic aid (tablet and capsule diluent).

Uses

Calcium Sulfate is a general additive available as both calcium sul- fate anhydrous, made by the high-temperature calcining of gypsum which is then ground and separated, and calcium sulfate dihydrate, which is made by grinding and separating gypsum containing about 20% water of crystallization. calcium sulfate anhydrous contains approximately 29% calcium, and calcium sulfate dihydrate contains approximately 23% calcium. it is used, among other things, as a filler and baking powder for standardization purposes; a firming agent in canned potatoes, tomatoes, carrots, lima beans, and pep- pers; in dough as a source of calcium ions (because the absence of calcium ions causes bread dough to be soft and sticky and to pro- duce bread of poor quality); in soft-serve ice cream to produce dry- ness and stiffness; as a calcium ion source for reaction with alginates to form dessert gels; and as a calcium source for food enrichment.

Preparation

Calcium Sulfate may be prepared by the addition of a soluble calcium salt to a solution of sodium sulfate:
CaCl2+ Na2SO4→CaSO4+ 2NaCl
The product is generally a dihydrate although other hydrates are also known. The CAS numbers of these materials are: 7778-18-9 (anhydrite); 10034-76-1 (hemihydrate); 10101-41-4 (dihydrate).

Definition

ChEBI: Calcium sulfate is a calcium salt and an inorganic calcium salt.

Industrial uses

Calcium sulfate (CaSO4?2H2O) is the common blackboard chalk.

calcium sulfate Preparation Products And Raw materials

Raw materials

Preparation Products

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calcium sulfate Suppliers

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View Lastest Price from calcium sulfate manufacturers

airuikechemical co., ltd.
Product
Calcium Sulfate 99400-01-8
Price
US $0.00-0.00/Kg
Min. Order
1Kg
Purity
99.9%
Supply Ability
200 tons
Release date
2024-04-07
Hebei Guanlang Biotechnology Co., Ltd.
Product
calcium sulfate 99400-01-8
Price
US $0.00-0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
500000kg
Release date
2022-10-11

99400-01-8, calcium sulfateRelated Search:


  • CALCIUM SULFATE
  • Calcium Sulfate Fcc
  • calcium sulfate for tofu
  • 99400-01-8