Used as a silylating agent in organic synthesis, particularly for the protection of hydroxyl and carboxyl groups during multi-step reactions. Its reactivity allows efficient introduction of the trimethylsilyl group, enhancing volatility and stability of compounds, which is beneficial in analytical techniques like gas chromatography and mass spectrometry. Commonly employed in the preparation of derivatives for steroid and carbohydrate analysis. Also serves as a reagent in the synthesis of pharmaceuticals and agrochemicals where selective functional group protection is required.