Used primarily as a protecting agent for diols and other hydroxyl-containing compounds in organic synthesis. It reacts readily with 1,2- and 1,3-diols to form cyclic acetals, which are stable under basic conditions and help shield sensitive functional groups during multi-step reactions. Commonly employed in carbohydrate chemistry, nucleotide synthesis, and natural product synthesis where selective protection is required. Also serves as a water scavenger in anhydrous reaction systems due to its ability to react with trace water, forming methanol and acetone as byproducts. Its volatility and ease of removal make it convenient for use in solvent-sensitive processes.