Used as a protecting group reagent for alcohols and phenols in organic synthesis, particularly in acid-catalyzed reactions. It reacts readily with hydroxyl groups under mild acidic conditions to form ethoxypropyl ethers, which are stable under a variety of reaction conditions but can be easily removed with aqueous acid when needed. This makes it valuable in multi-step synthesis where selective protection and deprotection are required. Also employed in the preparation of fragrances and flavoring agents due to its ability to modify and stabilize reactive functional groups during processing. Its volatility and reactivity require careful handling, but its efficiency in protection strategies keeps it in use in pharmaceutical and fine chemical manufacturing.