Magnesium sulphate
Magnesium sulfate

A white crystalline solid with the formula MgSO₄, which is commonly used as a desiccant in organic synthesis.

Its use as a desiccant is based on the fact that it is relatively inert.

It is also known as Epsom Salt.

It exists in a hydrated form with 7 molecules of water.

Note :
modern textbooks write "sulfate" but older ones write "sulphate".

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