Used as a silylating agent in organic synthesis, particularly in the protection of hydroxyl and amino groups during multi-step reactions. Its dimethylamino group enhances reactivity and selectivity, making it valuable in the preparation of intermediates for pharmaceuticals and agrochemicals. Also employed in surface modification of silica-based materials to improve hydrophobicity and compatibility with polymers. Useful in analytical chemistry for derivatizing polar compounds to enable gas chromatographic analysis.