has role inorganic fertilizer organic magnesium salt magnesium sulfate A magnesium salt having sulfate as the counterion. Magnesium sulfate (1:1) Magnesiumsulfat MgSO4 magnesium sulfate magnesium sulfate anhydrous magnesium sulphate magnesium(II) sulfate sulfuric acid magnesium salt sulphate of magnesia fertilizer magnesium salt analgesic cardiovascular drug anticonvulsant anti-arrhythmia drug calcium channel blocker anaesthetic metal sulfate tocolytic agent