Used primarily as an alkylating agent in organic synthesis, enabling the introduction of alkyl groups to nucleophilic substrates. It is particularly valuable in the preparation of quaternary ammonium compounds and in the modification of nitrogen-containing heterocycles. Its reactivity makes it suitable for use in the development of pharmaceutical intermediates and in the synthesis of functionalized aromatic compounds. Due to the presence of the nitro group, it can also participate in reduction reactions to yield amino derivatives, expanding its utility in multi-step synthetic pathways. Handle with care due to potential mutagenic and irritant properties.