Magnesium chloride is used for a variety of other applications besides the production of magnesium: the manufacture of textiles, paper, fireproofing agents, cement and refrigeration brine dust and erosion control. Mixed with hydrated magnesium oxide, magnesium chloride forms a hard material called Sorel cement.
Benefits
Magnesium chloride is primarily used to supplement your dietary intake of magnesium. While it doesn't "treat" conditions per se, it can help overcome magnesium deficiency and, by doing so, improve or restore certain physiological functions.