Used as a silylating agent in organic synthesis, particularly for introducing the 4-biphenylyldimethylsilyl protecting group. It is effective in protecting alcohols, phenols, and other hydroxyl-containing compounds during multi-step syntheses due to the group’s stability under various reaction conditions and its ease of removal when needed. The bulky biphenylyl moiety enhances steric protection, improving selectivity and yield in sensitive reactions. Commonly applied in the synthesis of pharmaceuticals, agrochemicals, and advanced materials where precise functional group control is required. Also utilized in surface modification of silica and other hydroxylated materials to adjust hydrophobicity and improve compatibility in composite systems.