CALCIUM SULFITE

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CALCIUM SULFITE Basic information
Description
Product Name:CALCIUM SULFITE
Synonyms:CALCIUM SULFITE
CAS:
MF:CaO3S
MW:120.14
EINECS:
Product Categories:
Mol File:Mol File
CALCIUM SULFITE Structure
CALCIUM SULFITE Chemical Properties
Solubility Product Constant (Ksp)pKsp: 7.17
Safety Information
MSDS Information
CALCIUM SULFITE Usage And Synthesis
DescriptionCalcium sulfite,CaS03·O.5H20, is colorless, hexagonal crystals which are nearly insoluble in water. It is formed when sulfur dioxideis passed through a solution of calcium hydroxide, or when solutions of calcium salts and alkali sulfites are mixed. Used as a disinfectant in the sugar industry and breweries, to preserve fruit juices, and as an antichlorine in textile bleaches.
Chemical PropertiesCaSO3.2H2O, white precipitate, pKsp = 7.9, formed by reaction of soluble calcium salt solution and sodium sulfite solution, or by boiling calcium hydrogen sulfite solution; calcium hydrogen sulfite, Ca(HSO3)2, formed in solution by saturating calcium hydroxide or carbonate suspension with sulfurous acid.
UsesA major use of calcium sulfite in the past has been the use of “lime” (Ca(OH)2) in “flue-gas” desulphurization (removal of SO2 gas) at “fossil-fuel” electrical power generating plants. Since calcium sulfite is relatively insoluble in water, it can be removed from the slurry by filtration and converted to gypsum, CaSO4·2H2O. The other usage of calcium sulfite or bisulfite compounds has been in the “wood-pulping” industry.
PreparationCalcium sulfite can be prepared by the reaction of sodium sulfite with calcium chloride:
CaCl2+ Na2SO3→CaSO3+ 2NaCl
The dihydrate, CaSO3·2H2O is formed. This salt is white powder that is soluble in dilute sulfurous acid to form the bisulfite. It may be dehydrated at 150°C to form the anhydrous salt. It is used in the sulfite process for the manufacture of wood pulp.
CALCIUM SULFITE Preparation Products And Raw materials
Tag:CALCIUM SULFITE Related Product Information
Barium sulfate Barium sulfite Magnesium sulfate calcium sulfate Strontium sulfate MAGNESIUM SULFITE STRONTIUM SULFITE Radium Sulfite BERYLLIUM SULFATE TETRAHYDRATE Radium Sulfate Calcium sulfate dihydrate Calcium sulfate hemihydrate