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Magnesium sulfate is an inorganic salt with the formula MgSO4(H2O)x where 0≤x≤7. It is often encountered as the heptahydrate sulfate mineral epsomite (MgSO4·7H2O), commonly called Epsom salt.
M 1307 (OTTO) Magnesium sulphate, GR 99%+ Cas 10034-99-8 - used as bath salts and for isolation tanks.