Magnesium sulfate (MgSO 4) is often encountered in the construction industry where it can either be a component of the materials used or a part of the environmental challenge affecting the durability of concrete structures. Known for its deleterious effects when interacting with concrete, MgSO 4 can lead to significant deterioration, commonly referred to as sulfate attack. This phenomenon is critical to understand, especially in environments where concrete is exposed to soils or waters containing high levels of sulfates.