zinkbrom

Zinc bromide, known in Dutch as zinkbrom, is an inorganic compound with the chemical formula ZnBr2. It appears as a white or colorless crystalline solid and is highly hygroscopic, meaning it readily absorbs moisture from the air. It is highly soluble in water, where it dissociates into zinc ions and bromide ions. In the solid state the material often forms polymeric networks, while in solution it behaves as a source of Zn2+ and Br−.

Zinc bromide can be prepared by direct reaction of zinc metal with bromine, represented by Zn + Br2 → ZnBr2. It can also be produced by reacting zinc compounds, such as zinc oxide or zinc carbonate, with hydrobromic acid. The compound is relatively stable under ordinary storage conditions but reacts with water to form acidic solutions due to hydrolysis of zinc ions.

Uses of zinc bromide include its role as a Lewis acid catalyst in various organic synthesis reactions. It is also employed as an electrolyte in certain zinc–bromine redox flow batteries and related energy storage technologies. Additionally, zinc bromide can be used in the preparation of organozinc reagents used in cross-coupling chemistry.

Safety and handling guidelines emphasize that zinc bromide is corrosive and can irritate skin, eyes, and the respiratory tract. It should be handled with appropriate personal protective equipment and stored in a tightly closed container in a dry, well-ventilated area away from incompatible materials. In case of exposure, rinse with plenty of water and seek medical advice as needed.