Used as a reagent in organic synthesis, particularly in the preparation of pharmaceuticals and fine chemicals. It serves as a source of the tert-butylbenzylamine moiety in reactions where a protected amine group is needed. The hydriodide salt form enhances stability and handling, making it suitable for use in alkylation, acylation, and coupling reactions. Commonly employed in the development of active pharmaceutical ingredients (APIs) where controlled release of the amine is required. Also utilized in analytical chemistry as a derivatizing agent for carboxylic acids and other functional groups to improve detection in chromatographic methods.