Magnesium sulfate

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Magnesium sulfate
Chemical formula MgSO4
OTP appearance white solid 
Molar Mass(g/mol) 120.366 
Melting Point(°C) 1124 (decomp) 
Density(g/cc) anh:2.66
hept:1.68 
Solubility in water(g/L) 255
NFPA 704
NFPA704.png
0
1
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Thermal decomposition of
magnesium sulfate 11-hydrate
2
11-hydrate
2°C
7-hydate
150
7-hydrate
150°C
1-hydrate
200
1-hydrate
200°C
anhydrous
1124
anhydrous
1124°C
MgO,SO2.O2

Uses

Primary

  • Pharm: WHO LEM, Emergency Medicine

Other

  • Dessicant: heptahydrate decomposes at 150°C to monohydrate. This temperature is conveniently higher than the 100°C for boiling water, so the absorbed water will remain locked even if unabsorbed water is removed by distillation.
  • Fertilizer: soluble source of both magnesium (for chlorophyll) and sulfur
  • Treatment for barium/cadmium poisoning
  • Treatment for cardiac arrhythmia
  • Bronchodialator

Natural occurrence

  • Magnesium sulfate occurs as the mineral epsomite

Hazards

Production

Extraction

Synthesis

Combine Magnesium carbonate or magnesium hydroxide with sulfuric acid, giving magnesium sulfate

MgCO3 + H2SO4 MgSO4 + CO2 + H2O
Mg(OH)2 + H2SO4 + MgSO4 + 2 H2O

Purification

Testing

Storage

Disposal

See Also

References