Used as an intermediate in organic synthesis, particularly in the pharmaceutical industry for constructing more complex molecules. Its functional groups—bromine and hydroxyl—allow for selective reactions, such as nucleophilic substitutions or protection/deprotection strategies. Commonly employed in the preparation of active pharmaceutical ingredients (APIs) where a four-carbon chain with specific stereochemistry is required. Also utilized in the synthesis of agrochemicals and specialty polymers due to its reactivity and structural versatility.