Q. Does the K-7402 react with Chlorine and Bromine?

A. Yes. The kit reacts with both Chlorine & Bromine. If you use the K-7402 to analyze for bromine, you should multiply ppm ozone result by 3.3 to convert to ppm bromine. If you use the K-7402 to analyze for chlorine, you should multiply ppm ozone result by 1.5 to convert to ppm chlorine.