Used as a protecting group reagent in organic synthesis, particularly for the protection of alcohols. It selectively introduces the 4-biphenylyl methyl (Bpm) carbonate group, which is stable under a variety of reaction conditions but can be removed under mild basic or nucleophilic conditions. This makes it valuable in multi-step syntheses, especially in the pharmaceutical and fine chemical industries, where controlled deprotection is essential. Its bulky aromatic structure enhances selectivity and can influence the solubility and crystallinity of intermediates.