Anhydrous magnesium sulfate
Anhydrous magnesium sulfate is a white crystalline solid known for its hygroscopic nature, meaning it readily absorbs water from
the air. This property makes it an excellent desiccant, commonly used to dry organic solvents and other substances.It is highly
soluble in water, and its solubility increases with temperature. It forms a neutral solution, as it neither acts as a strong acid nor a base.
In addition to water, it is also soluble in glycerol and ethanol, but insoluble in acetone. Chemically, anhydrous magnesium sulfate is
stable under normal conditions but decomposes at high temperatures, releasing sulfur trioxide and leaving behind magnesium oxide.
It can react with acids to form magnesium salts and with bases to form various double salts. In the presence of water, it readily
hydrates, forming the heptahydrate form known as Epsom salt. This transformation is exothermic, releasing heat in the process.
Test item |
Specification |
(MgSO4)
Content |
99.5% min |
| MgSO4 |
48.59% min |
| pH(5W/V%Sol) |
5-8 |
Iron (Fe) |
0.001% max |
Chlorid (Cl) |
0.015% max |
Heavy metal (Pb) |
0.0008% max |
Arsenic (As) |
0.0002% max |
Size |
2-4 mm |
Anhydrous magnesium sulfate is a versatile compound with various applications across different industries. In laboratories, it is
commonly used as a drying agent due to its high affinity for water, effectively removing moisture from organic solvents and chemical
mixtures. In agriculture, anhydrous magnesium sulfate serves as a key ingredient in fertilizers, providing essential magnesium and
sulfur nutrients that enhance plant growth and yield. In the pharmaceutical industry, it is utilized in the synthesis of certain medications
and as a desiccant to maintain the stability of pharmaceutical products. Additionally, it plays a role in the production of textiles, helping
to improve dye uptake and color fastness. Its use extends to the food industry as well, where it acts as a firming agent and pH regulator
in various food products. The versatility and efficacy of anhydrous magnesium sulfate make it an indispensable material in these and
other sectors.
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