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The oxidation number of sodium in sodium bromide is 1. 1  Formula: NaBr. 2  Hill system formula: Br 1 Na 1. 3  CAS registry number: [7647-15-6]. 4  Formula weight: 102.894. 5  Class: bromide. 6  Colour: white. 7  Appearance: crystalline solid. 8  Melting point: 747Â°C. 9  Boiling point: 1390Â°C. 10  Density: 3200 kg m -3.
Hydrogen bromide. Hydrogen bromide is the diatomic molecule with the formula HBr. It is a colorless compound and a hydrogen halide. Hydrobromic acid is a solution of HBr in water. Both the anhydrous and aqueous solutions of HBr are common reagents in the preparation of bromide compounds. HBr is very soluble in water, forming hydrobromic acid solution, which is saturated at 68.85% HBr by weight at room temperature. Aqueous solutions that are 47.6% HBr by weight form a constant-boiling azeotrope mixture that boils