Beryllium dibromide (BeBr₂) is an inorganic compound with the CAS number 7787-46-4. It is a white to slightly yellow crystalline solid that is highly hygroscopic and reacts violently with water. It is typically prepared by the direct reaction of beryllium metal with bromine or by the reaction of beryllium oxide with carbon and bromine. Its primary application is as a chemical precursor in materials science and inorganic synthesis. It serves as a source of beryllium ions for the synthesis of other beryllium compounds and is used in chemical vapor deposition (CVD) processes to produce beryllium-containing thin films or nanomaterials. It can act as a precursor for beryllium oxide (BeO) ceramics, which have high thermal conductivity and electrical insulation properties. Due to the extreme toxicity of beryllium and its compounds, handling beryllium dibromide requires stringent safety precautions in a controlled environment to prevent inhalation or contact. It is primarily a research and specialty industrial chemical with no widespread commercial use in consumer products.