mPEG10-azide | CAS 2112738-12-0

mPEG10-azide is a methoxy-terminated polyethylene glycol (mPEG) bearing a terminal azide functional group, designed for copper-free and/or copper-mediated azide–alkyne click chemistry workflows. As an azide-tagged PEG building block, it combines the biophysical benefits of PEGylation with a highly selective handle for modular conjugation. This reagent is widely used to introduce PEG spacers onto biomolecules, surfaces, and formulations, enabling improved solubility, reduced nonspecific interactions, and controlled construction of conjugates for chemical biology and materials research.

1. PEGylation Surface Functionalization

mPEG10-azide is commonly used to functionalize polymeric and inorganic surfaces with PEG layers via subsequent click coupling to alkyne-bearing linkers or coatings. Researchers in biomaterials and interface engineering rely on the azide handle to graft PEG spacers onto substrates, improving wettability, minimizing protein adsorption, and providing a defined platform for further attachment of biomolecule ligands. Because the reagent is already PEG-terminated, downstream conjugation workflows often focus on attaching the PEG layer to a chosen surface chemistry while maintaining a consistent tether length and antifouling character.

2. Biomolecule Conjugation Handles

mPEG10-azide serves as a convenient PEGylation reagent for introducing PEG spacers onto proteins, peptides, and other macromolecular constructs that have been equipped with complementary alkyne partners. Chemical biology groups use the azide functionality to generate site-specific or modular PEG conjugates that are compatible with downstream labeling, affinity reagent preparation, or multicomponent assembly. In these workflows, the PEG chain acts as a steric and solubility-modulating component, while the azide provides a robust click handle for controlled attachment without requiring extensive redesign of the biomolecule scaffold.

3. Imaging Probe and Label Construction

mPEG10-azide is frequently incorporated into molecular imaging and analytical probe development as a PEG spacer that improves probe solubility and influences biodistribution-relevant physicochemical properties in preclinical research settings. Probe designers use the azide group to couple PEGylated scaffolds to fluorescent dyes, affinity tags, or imaging-reactive moieties that carry alkyne functionalities, enabling systematic variation of linker length and hydrophilicity. This modular approach supports rapid generation of probe libraries for assay development, orthogonal labeling strategies, and multiplexed readouts in chemical biology laboratories.

4. Drug Delivery Formulation Building Blocks

mPEG10-azide is used as a formulation-oriented PEG component in materials and delivery research, where PEGylated architectures help tune colloidal stability and interfacial behavior. In these applications, the azide handle enables post-assembly functionalization with alkyne-bearing ligands, crosslinkers, or targeting/steering modules, allowing researchers to build multifunctional carriers from PEG-functional precursors. The reagent’s PEG termination and clickable azide end make it practical for iterative optimization of carrier surface chemistry, including the incorporation of stealth-like PEG layers and the attachment of additional chemical functionalities for downstream studies.