Used in the production of inorganic bromides such as zinc, calcium, and sodium bromides, which are applied in drilling fluids, flame retardants, and photography. Serves as a catalyst and reagent in organic synthesis, especially in the preparation of alkyl bromides and in the cleavage of ethers and esters. Employed in the pharmaceutical industry for the synthesis of sedatives and other drugs. Utilized in the extraction of certain metals and in the regulation of pH in industrial processes. Also used in the purification of resins and as an etching agent for metals and semiconductors.