Used as a protecting group reagent in organic synthesis, particularly for aldehydes and ketones. Its primary application is in the formation of cyclic acetals, which stabilize carbonyl groups during multi-step syntheses. This makes it valuable in pharmaceutical and fine chemical manufacturing where selective reactions are required. It is also employed in the preparation of fragrances and flavors due to its ability to mask reactive carbonyl functionalities and release them under mild acidic conditions. Additionally, it serves as a building block in polymer chemistry and in the synthesis of specialty monomers.