Used as a derivatization reagent in analytical chemistry, particularly in the detection and quantification of amines and amino acids. Its isothiocyanate group reacts selectively with primary amines to form stable thiourea derivatives, which are easier to analyze using techniques like HPLC or GC-MS. Also employed in the synthesis of agrochemicals and pharmaceutical intermediates due to its ability to introduce hydrophobic tert-butyl aromatic moieties into larger molecules. Shows utility in materials science for modifying surface properties of polymers through covalent attachment.