Magnesium sulfate is a chemical compound containing magnesium and sulfate, with the formula MgSO4. In its hydrated form the pH is 6.0 (5.5 to 7.0). It is often encountered as the heptahydrate, MgSO4ยท7H2O, commonly called Epsom salt. Anhydrous magnesium sulfate is used as a drying agent. ...

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