Ph-PEG3 is widely used in the field of bioconjugation and drug delivery due to its ability to link molecules with improved solubility and stability. It serves as a spacer in the development of antibody-drug conjugates (ADCs), enhancing the efficacy and reducing the side effects of therapeutic agents. In material science, it is utilized to modify surfaces, improving biocompatibility and reducing non-specific interactions. Additionally, Ph-PEG3 is employed in the synthesis of peptides and small molecules, facilitating the attachment of functional groups for targeted applications in research and pharmaceuticals. Its role in creating hydrophilic coatings also makes it valuable in nanotechnology and diagnostic tools.