Used primarily as an intermediate in organic synthesis, particularly in the preparation of functionalized amines and heterocyclic compounds. It serves as a nitrosating agent in specialized reactions where controlled introduction of the nitroso group is required. Due to the presence of the tert-butyl and ethyl groups, it can act as a sterically hindered reagent, influencing reaction selectivity in certain pathways. Its application is mostly confined to research laboratories for the development of pharmaceuticals and agrochemicals, where it participates in the formation of nitrogen-containing scaffolds. Handling requires caution due to the potential instability and toxicity associated with nitrosamine derivatives.