Polyethylene glycol monomethyl ether methanesulfonate is widely used in the synthesis of polymers and as a reactive intermediate in organic chemistry. Its primary application is in the modification of surfaces and materials to enhance their properties, such as biocompatibility and hydrophilicity. It is often employed in the preparation of hydrogels and drug delivery systems, where it helps in controlling the release of active pharmaceutical ingredients. Additionally, it serves as a key component in the production of functionalized polymers for coatings, adhesives, and biomedical devices, improving their performance and stability. Its role in creating tailored macromolecules makes it valuable in advanced material science and nanotechnology applications.