Ammonium bromide is widely used in the photography industry as a component in photographic emulsions. It helps in controlling the light sensitivity of silver halide crystals, which are crucial for image development. In the field of medicine, it serves as a sedative and anticonvulsant, particularly in the treatment of epilepsy, though its use has declined with the advent of newer medications. Additionally, it is employed in the synthesis of organic compounds, acting as a brominating agent in various chemical reactions. In fire safety, it is used as a flame retardant in certain materials to inhibit combustion. Its applications also extend to the textile industry, where it is utilized in dyeing and printing processes to enhance color fixation.