Magnesium Sulphate

About Magnesium Sulphate

The composition of magnesium sulfate depends on whether it is anhydrous or in a hydrated form.

1. Magnesium Sulfate (Anhydrous)

• Chemical Name: Magnesium Sulfate
• Chemical Formula: MgSO
• CAS No.: 7487-88-9
• Molecular Weight: 120.37 g/mol

Typical composition:

Equivalent oxide analysis:

• Magnesium Oxide (MgO): 33.5%
• Sulfur Trioxide (SO): 66.5%

2. Magnesium Sulfate Heptahydrate (Epsom Salt)

Epsom salt

• Chemical Formula: MgSO7HO
• CAS No.: 10034-99-8
• Molecular Weight: 246.47 g/mol

Typical composition:

Equivalent analysis:

• Magnesium Oxide (MgO): 16.2%
• Sulfur Trioxide (SO): 32.5%

Typical Specifications (Industrial/Fertilizer Grade)

• Magnesium Sulfate (MgSO): 9899.5% min
• Magnesium Oxide (MgO): 1617%
• Sulfur (S): 13% min
• Chloride (Cl): 0.03% max
• Iron (Fe): 0.0010.005% max
• pH (5% solution): 5.08.0
• Appearance: White crystalline powder or granules

If you need the composition for fertilizer grade, pharmaceutical grade, food grade, or export COA/specification, I can provide the appropriate specification.