Used as a silylating agent in organic synthesis to protect hydroxyl, carboxyl, and amino groups by converting them into trimethylsilyl ethers or esters. This protection is reversible and helps stabilize sensitive functional groups during multi-step reactions. Commonly employed in the preparation of derivatives for gas chromatography and mass spectrometry to improve volatility and detection of polar compounds. Also serves as a reagent in the synthesis of silicon-based polymers and as a moisture scavenger in silicone sealants and adhesives. Plays a role in the production of pharmaceuticals and agrochemicals where selective protection is required.