No known practical applications exist for sodium hexabromorhodate(III) hydrate. It is primarily used in specialized research settings as a precursor or reagent in inorganic and coordination chemistry studies. Its main role is in the synthesis and analysis of rhodium-based complexes, particularly those involving halide ligands. Due to the rarity and cost of rhodium, compounds like this are typically limited to academic or catalytic research, with no significant industrial or commercial use reported.