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Magnesium Sulfate(heptahydrate)

  • Product Name: Magnesium sulfate heptahydrate
  • Cas No.: 10034-99-8
  • Purity: 99.9%
  • MF: MgSO47·(H2O)
  • Appearance: White crystalline particle
  • Package: Bag
  • Certificate: ISO
  • Application: Used in leather, fertilizer, porcelain, matches, explosives, printing and dyeing, medicine and other industries.
  • Sample: Available

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Product Detail

Magnesium sulfate heptahydrate (molecular formula MgSO4·7H2O), also known as sulfur bitter, bitter salt, cathartic salt, Epsom salt, is a white or colorless needle or oblique columnar crystal, odorless, cool and slightly bitter, molecular weight :246.47, specific gravity 1.68, easily soluble in water, slightly soluble in ethanol and glycerol, soluble in its own crystalline water at 67.Chemicalbook5℃. When decomposed by heat, 70, 80℃ is the crystal water that loses four molecules. The month 200℃ lost all the crystalline water into anhydrous matter. In the air (dry) easy to weather into powder, heating gradually remove the crystalline water into anhydrous magnesium sulfate, this product does not contain any toxic impurities.

Product Parameter

Synonyms Sulfuricacid magnesium salt (1:1), heptahydrate (8CI,9CI);Magnesium sulfate (MgSO4)heptahydrate;Magnesium sulfate heptahydrate(MgSO4.7H2O);Magnesium sulfate hydrate (MgSO4.7H2O)
Chemical Formula MgSO47·(H2O) CAS Number 10034-99-8
Molar mass 246.47 UN number
Appearance White crystalline particle
Density 1.68
Melting point 1124°C
Vapor density <0.01 (vs air)
Vapor pressure <0.1 mm Hg ( 20 °C)
Stability Stable. Non-flammable. Contact with air may deteriorate slowly.
PH value 5.0-8.0 (25℃, 50mg/mL in H2O)
Storage condition Store at +5°C to +30°C.


1. Industrial field: Magnesium sulfate heptahydrate is widely used in industry, mainly used in fertilizer, leather, printing and dyeing, catalyst, paper making, plastics, porcelain, pigments, matches, explosives and fireproof materials. It is also used for printing and dyeing thin cotton cloth and silk, as a weighting agent for cotton silk and a filler for kapok products. In addition, magnesium sulfate heptahydrate can be used as a conductive salt in electroplating industry; In the environmental protection industry, it is used directly as a sewage treatment agent or as a raw material of sewage treatment agent; Magnesium sulfate heptahydrate is used to stabilize the body in the drying and sintering process of magnesia refractory. In the construction industry, magnesium sulfate heptahydrate is used as a coagulant aid for cement. In the pulp production of paper industry, magnesium sulfate heptahydrate is used to increase the selectivity of oxygen bleaching lignin, improve the quality of cellulose and save the amount of product.

2. Medical field: Magnesium sulfate heptahydrate is used as an Epsom salt in medicine, is an anticonvulsant, and is also used in the manufacture of magnesium trisilicate, mywhitomycin, acetylspiramycin and myoxib and other drugs. It can also be used to produce lactic acid, monosodium glutamate and other food additives.

3. Agricultural field: Magnesium sulfate heptahydrate can be used as fertilizer in agriculture to provide magnesium for plants and promote the growth and development of plants.