Why is bromine sometimes preferred as a disinfectant?

Bromine is often preferred as a disinfectant in pool settings because of its unique properties, particularly when it comes to maintaining effectiveness at higher temperatures. When bromine is introduced into water, it forms various derivatives, including combined bromine, which retains strong sanitizing capabilities even in environments where chlorine might become less stable or effective. This characteristic makes bromine particularly advantageous in hot tubs and spas, where the water temperature typically exceeds that of conventional swimming pools.

Additionally, combined bromine does not produce the same levels of harmful chloramines as chlorine can, which helps to improve water clarity and reduce irritation for swimmers. Because bromine remains effective across a wider pH range compared to chlorine, this consistency in performance further supports its preference in certain applications.

While factors like cost and impacts on pH can influence the choice of disinfectant, the stability and effectiveness of combined bromine at elevated temperatures stand out as crucial advantages, making it a popular option for pool sanitation.