This compound, 2-((tert-Butyldimethylsilyl)oxy)ethanol, is a mono-protected derivative of ethylene glycol, where one hydroxyl group is shielded by a tert-butyldimethylsilyl (TBDMS) group. It functions as a key building block and intermediate in organic synthesis, enabling the introduction of a protected hydroxyethyl functionality while allowing selective reactions at the free hydroxyl group. This is particularly useful in the synthesis of pharmaceuticals, natural products, and fine chemicals, where precise control over reactive sites is required. The TBDMS protection offers stability across a range of reaction conditions and can be readily removed under mild deprotection protocols. Additionally, it finds applications in preparing intermediates for polymers and advanced materials.