1. Pharmaceuticals

• Source of Magnesium: Magnesium bromide hexahydrate provides magnesium ions, which are essential for various bodily functions, including muscle and nerve function. It can be used in formulations to supplement magnesium levels in medications. 
• Mild Sedative and Anticonvulsant: It is known for its calming and anti-seizure properties, making it useful in treating nervous disorders.

2. Performance Chemicals

• Organic Synthesis: This compound is a valuable reagent in organic synthesis, particularly in Grignard reactions, which are crucial for building the carbon frameworks of many pharmaceutical molecules. 
• Biginelli Reaction: Magnesium bromide hexahydrate is a catalyst for the one-pot synthesis of dihydropyrimidinones through the Biginelli reaction. 
• Alkene Hydrogenation: It can catalyze the hydrogenation of alkenes to produce specific symmetric and chiral centers, especially when combined with CH2Cl2. 
• Functional Group Coupling: MgBr2 can facilitate the coupling of various functional groups. 
• Electrolyte: It's used as an electrolyte and a source of bromine in electrochemical oxidation of secondary alcohols. 
• Lewis acid catalyst: Magnesium bromide hexahydrate is used in chemical synthesis as a Lewis acid catalyst, primarily to activate reactants by accepting electron pairs. This activation facilitates various organic reactions, including aldol reactions and Diels-Alder reactions.

3. Energy

• Clear brine fluid: Magnesium bromide hexahydrate is used in clear brine fluids as a key component for achieving high density and maintaining a solid-free, low-viscosity solution. These fluids are essential in oil and gas well completion, providing hydrostatic pressure for well control and preventing formation damage.