Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals, 3-bromoisothiazole serves as a building block for bioactive molecules due to its reactive bromine atom, which allows for cross-coupling reactions. Its structure is valuable in the development of fungicides and bactericides, especially in industrial and agricultural settings where microbial control is critical. The compound also finds use in research for designing new isothiazole-based compounds with potential therapeutic or pesticidal activity.