ZnBr2

Zinc bromide is an inorganic compound with the chemical formula ZnBr2. It is a white, crystalline solid that is soluble in water and alcohol. Zinc bromide can be synthesized by reacting zinc metal with bromine or by reacting zinc oxide with hydrobromic acid. It is a hygroscopic substance, meaning it readily absorbs moisture from the air.

ZnBr2 exists in various hydrated forms, such as the dihydrate ZnBr2·2H2O. In its anhydrous form, it adopts a crystal structure where each zinc ion is coordinated to four bromide ions. The compound is known to form complexes with various ligands.

Industrially, zinc bromide has applications as an electrolyte in zinc-bromine flow batteries, which are a type of rechargeable battery. It is also used as a catalyst in organic synthesis and as a component in flame retardants. In some historical applications, it has been used as a transparent shield against radiation due to its high density. However, it is an irritant and should be handled with appropriate safety precautions.