Used as a drying agent in organic synthesis due to its high affinity for water, effectively removing trace moisture from solvents and reaction mixtures. Commonly employed in laboratory settings to dry liquids before distillation or further processing. Also serves as a catalyst support and reagent in various chemical reactions, including Grignard reactions where anhydrous conditions are critical. In industrial applications, it is utilized in the production of fertilizers, pharmaceuticals, and dietary supplements where controlled magnesium content is required. Its anhydrous form ensures no unwanted water introduction during sensitive processes.