Bis-PEG17-acid is widely used in the field of bioconjugation and drug delivery due to its long polyethylene glycol (PEG) chain, which enhances solubility and stability of compounds. It is often employed as a linker in the development of antibody-drug conjugates (ADCs), where it connects the drug molecule to the antibody, ensuring targeted delivery to specific cells while minimizing off-target effects. Additionally, its hydrophilic nature makes it valuable in modifying proteins, peptides, and nanoparticles to improve their biocompatibility and reduce immunogenicity. Bis-PEG17-acid is also utilized in the synthesis of hydrogels and other biomaterials for tissue engineering applications, where its properties help create scaffolds with controlled release capabilities. Furthermore, it plays a role in surface modification of medical devices to prevent protein adsorption and improve performance in biological environments.