Magnesium sulfate heptahydrate, commonly known as Epsom salt, has the chemical formula MgSO4·7H2O. It is a crystalline, colorless to white solid that contains seven water molecules (heptahydrate) associated with each magnesium sulfate unit. Here are some key aspects of Magnesium Sulfate Heptahydrate: Chemical Properties: Formula: MgSO4·7H2O Molar Mass: Approximately 246.47 g/mol Solubility: Highly soluble in water Good crystal structure, monoclinic at room temperature CAS N