This compound, (4-(((tert-butyldiphenylsilyl)oxy)methyl)phenyl)methanol, is a selectively protected diol intermediate primarily used in organic synthesis. It consists of a benzene ring bearing a free primary alcohol (-CH₂OH) and a para-positioned tert-butyldiphenylsilyloxy-protected hydroxymethyl group (-CH₂OTBDPS). The TBDPS group provides robust protection for one hydroxyl, enabling selective functionalization of the unprotected alcohol in multi-step reactions. This orthogonality is valuable in pharmaceutical synthesis, natural product assembly, and preparation of fine chemical intermediates for advanced materials, where precise control over functional groups is essential. The protecting group can be removed under mild conditions post-synthesis.