Used primarily as an intermediate in organic synthesis, especially in the preparation of dyes and pharmaceuticals. It serves as a derivatizing agent for the detection and analysis of phenols and alcohols in analytical chemistry due to its ability to form colored or UV-active derivatives. Also employed in research settings to study reaction mechanisms involving nucleophilic substitution, benefiting from the electron-withdrawing nitro groups that enhance reactivity. Its distinct yellow color aids in visual monitoring during reactions.