Rubidium bromide is an inorganic compound with the chemical formula . It is a salt of hydrogen bromide. It consists of bromide anions and rubidium cations . It has a NaCl crystal structure, with a lattice constant of 685 picometres.
There are several methods for synthesising rubidium bromide. One involves reacting rubidium hydroxide with hydrobromic acid:
Another method is to neutralize rubidium carbonate with hydrobromic acid: