MAGNESIUM SULFITE
- Product Name
- MAGNESIUM SULFITE
- CAS No.
- 7757-88-2
- Chemical Name
- MAGNESIUM SULFITE
- Synonyms
- Einecs 231-825-6;MAGNESIUM SULFITE;magnesium sulphite;Sulfurous acid magnesium salt;sulfurousacid,magnesiumsalt(1:1)
- 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
- EPA Substance Registry System
- Sulfurous acid, magnesium salt (1:1) (7757-88-2)
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
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View Lastest Price from MAGNESIUM SULFITE manufacturers
- Product
- MAGNESIUM SULFITE 7757-88-2
- Price
- US $1.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 20T
- Release date
- 2020-05-19
- Product
- MAGNESIUM SULFITE 7757-88-2
- Price
- US $1.00/KG
- Min. Order
- 1KG
- Purity
- 98%HPLC
- Supply Ability
- 10t
- Release date
- 2019-12-23