Used primarily as a derivatizing agent in organic synthesis, especially in peptide chemistry where it facilitates the protection of amino groups. It is also employed in the preparation of mixed carbonates and carbamates. Commonly applied in analytical chemistry to modify functional groups for better detection in gas chromatography or mass spectrometry due to increased volatility and detectability. Its reactivity makes it useful in the synthesis of pharmaceuticals and agrochemicals where controlled ester or carbamate formation is required. Handle with care due to its lachrymatory and moisture-sensitive properties.