Ammonium bromide is widely used in the photography industry as a component in photographic emulsions and developers. It helps in controlling the contrast and sensitivity of photographic films and papers, ensuring high-quality image reproduction. In the field of medicine, it serves as a sedative and anticonvulsant, particularly in the treatment of epilepsy and other nervous disorders, due to its bromide ion content. Additionally, it is employed in the manufacturing of fire retardants, where it acts as a flame suppressant in various materials. In organic synthesis, it is utilized as a source of bromide ions in reactions such as the preparation of alkyl bromides. Its role in water treatment includes use as a disinfectant and biocide to control microbial growth in industrial water systems.