Used as an alkylating agent in organic synthesis, particularly in the pharmaceutical industry for introducing propyl carbonate groups into molecules. It serves as a protecting group reagent for alcohols and phenols due to its ability to form stable carbonate esters under mild conditions. Also employed in the preparation of intermediates for agrochemicals and fine chemicals. Its chloromethyl group allows for further functionalization, making it valuable in multi-step synthesis. Handle with care due to its reactivity and potential lachrymatory effects.