What aspect can bromine not be used for that chlorine can?

Bromine is a highly effective chemical used for pool sanitation, similar to chlorine, but it does have some limitations. One key aspect where bromine cannot perform like chlorine is in stabilization. Chlorine is often stabilized using cyanuric acid, which protects it from degradation by sunlight, thereby extending its effectiveness in outdoor swimming pools. This stabilization allows chlorine to remain active longer under UV exposure, making it more reliable for consistent sanitation levels.

In contrast, bromine does not require stabilization in the same way. While it maintains its effectiveness in water, it does not experience the same degradation issue from UV light as chlorine does. However, bromine does not have a stabilization mechanism like the one provided by cyanuric acid for chlorine, which is why it falls short in this specific area compared to chlorine. Thus, when discussing the unique properties of these two sanitizers, bromine's lack of a stabilization capability sets it apart from chlorine in this context.