Magnesium sulfate is a salt with the formula MgSO4 , consisting of magnesium cations and sulfate anions. It is a white crystalline solid, soluble in water, and has many uses in agriculture, medicine, and industry. Magnesium sulfate or magnesium sulphate is a chemical compound, a salt with the formula MgSO₄, consisting of magnesium cations Mg²⁺ and sulfate anions SO2−4. It is a white crystalline solid, soluble in water but not in ethanol. Medscape - Indication-specific dosing for MgSO4 (magnesium sulfate), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost... Structure: CAS Number: 7487-88-9 (anhydrous) Molecular Weight: 120.37 g/mol (anhydrous) Appearance: White solid Chemical Formula: MgSO4 Anhydrous magnesium sulfate ( MgSO4 ) is commonly used as a drying agent in organic chemistry. It is typically used to dry the organic layer after an aqueous work-up. Anhydrous magnesium sulfate is added to the wet organic layer and the resulting solid magnesium sulfate hydrate is simply removed by filtration, providing a dry (anhydrous) organic filtrate ...