This chemical is widely used in the field of bioconjugation and drug delivery due to its polyethylene glycol (PEG) chain, which enhances solubility and stability of compounds. It serves as a linker or spacer in the synthesis of prodrugs, enabling controlled release of active pharmaceutical ingredients. The t-butyl ester group provides protection for carboxylic acids during chemical reactions, making it valuable in peptide synthesis and organic chemistry. Additionally, it is utilized in the development of PEGylated therapeutics, where it improves pharmacokinetics and reduces immunogenicity of drugs. Its application extends to the creation of hydrogels and biomaterials for tissue engineering and regenerative medicine.