Magnesium Sulfate Heptahydrate - Ferrous (II) Sulfate
2020-2-28 · It is often encountered as the heptahydrate sulfate mineral epsomite (MgSO 4 ·7H 2 O), commonly called Epsom salt, taking its name from a bitter saline spring in Epsom in Surrey, England, where the salt was produced from the springs that arise where the porous chalk of the North Downs meets non-porous London clay.
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