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MAGNESIUM SULFITE

MAGNESIUM SULFITE Structure
MAGNESIUM SULFITE
  • CAS No.7757-88-2
  • Chemical Name:MAGNESIUM SULFITE
  • CBNumber:CB3111136
  • Molecular Formula:MgO3S
  • Formula Weight:104.37
  • MOL File:7757-88-2.mol
MAGNESIUM SULFITE Property
  • Density 1.725 g/cm3
  • Water Solubility g/100g solution H2O: 0.338 (0°C), 0.646 (25°C), 0.615 (98°C); solid phase, MgSO3 · 6H2O (0°C, 25°C), MgSO3 ·3H2O (98°C) [KRU93]
  • Solubility Product Constant (Ksp) pKsp: 2.50
  • FDA UNII 792J6K230W
  • EPA Substance Registry System Sulfurous acid, magnesium salt (1:1) (7757-88-2)
Hazard and Precautionary Statements (GHS)
  • Symbol(GHS)
  • Signal word
  • Hazard statements
  • Precautionary statements

MAGNESIUM SULFITE Chemical Properties,Usage,Production

  • Chemical Properties White, crystalline powder. Slightly soluble in water; insoluble in alcohol.
  • Uses Magnesium sulfite has found usage in the “Kawasaki process” as first developed in Japan. Although magnesium sulfite has found a number of usages in industry, it is the bisulfite compound that is used extensively in the wood-pulping process.Dolomite can contain up to 40% magnesium and it was determined that calcium was more proficient in the “sulfite process” whereas magnesium bisulfite is used in the “Kraft process” of making wood pulp used to manufacture paper and cardboard products used extensively today.
  • Uses Manufacture of paper pulp (as bisulfite).
  • Preparation Magnesium Sulfite can be prepared by the reaction of a magnesium hydroxide slurry and SO2 gas:
    Mg(OH)2＋ SO2(gas) ＋H2O→MgSO3·6H2O
    If the solution temperature is kept below 40°C, the hexahydrate results. Above 40°C, the trihydrate, MgSO3·3H2O, is the usual product. Magnesium sulfite may also be prepared by adding a solution of sodium sulfite to a solution of magnesium chloride. The mix is kept at 25°C for 1–2 h and the solid phase which forms is separated and washed with isopropanol and dried at 60°C. Again, the hexahydrate results.
MAGNESIUM SULFITE Preparation Products And Raw materials
Raw materials
Preparation Products
MAGNESIUM SULFITE Suppliers
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MAGNESIUM SULFITE Spectrum
7757-88-2, MAGNESIUM SULFITERelated Search:
  • 亚硫酸镁(六水)
  • 亚硫酸镁
  • 7757-88-2
  • Einecs 231-825-6
  • Sulfurous acid magnesium salt
  • magnesium sulphite
  • sulfurousacid,magnesiumsalt(1:1)
  • MAGNESIUM SULFITE

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