Compared to unstabilized chlorine, how does bromine react to UV light?

Bromine reacts to UV light slower than unstabilized chlorine. This is primarily due to its chemical stability compared to chlorine. Unstabilized chlorine, which is more reactive, tends to break down quickly when exposed to UV light, losing its disinfecting ability. In contrast, bromine is less susceptible to degradation by UV radiation, allowing it to maintain its effectiveness as a disinfectant for a longer period when exposed to sunlight.

This property makes bromine a preferred choice in environments where UV exposure is a concern, such as outdoor swimming pools. Its slower reaction to UV light helps ensure a more consistent level of disinfection over time, enhancing overall water quality and safety.