Azido-PEG8-alcohol | CAS 352439-36-2

Azido-PEG8-alcohol is a PEG-based azide building block designed for copper-free and copper-mediated click chemistry workflows, enabling efficient conjugation of azide handles onto diverse molecular and material platforms. The reagent features a terminal azide group for bioorthogonal or click-based coupling, paired with an eight-unit PEG spacer that improves aqueous compatibility and reduces nonspecific interactions in labeling and assembly applications. Its flexible PEG alcohol functionality supports downstream derivatization and surface or polymer incorporation, making it a widely used reagent for constructing functional probes, linkers, and imaging or diagnostic components.

1. Surface And Polymer Functionalization

Azido-PEG8-alcohol is routinely used to introduce azide functionality onto polymer backbones, hydrogels, and surface coatings where PEG spacing helps maintain accessibility of the reactive handle. Researchers in biomaterials science and materials chemistry employ this reagent to create clickable interfaces for subsequent attachment of fluorophores, affinity ligands, or reactive moieties, enabling modular fabrication of patterned materials and multicomponent assemblies. The PEG alcohol character supports compatibility with aqueous processing and can be leveraged for integrating azide-bearing linkers into coating chemistries and polymer modification strategies.

2. Biomolecule Labeling Linkers

Azido-PEG8-alcohol serves as a practical azide-containing linker for preparing click-ready biomolecule conjugates, including labeling reagents used in chemical biology and molecular imaging tool development. The PEG8 spacer is particularly valuable when conjugation requires improved solubility and reduced steric hindrance, helping preserve the functional presentation of the azide group for later coupling to strained alkynes or complementary click partners. Common workflows include generating azide-functional intermediates that can be carried into downstream conjugation steps for constructing multivalent probes, affinity reagents, and imaging reporters.

3. Fluorophore And Imaging Probe Assembly

Azido-PEG8-alcohol is frequently used to build fluorescent and luminescent imaging probes by providing a stable azide handle for click-based attachment of dyes, reporter groups, or targeting motifs. In molecular imaging and diagnostic reagent development, PEG-mediated spacing supports consistent labeling density and helps maintain probe behavior in aqueous buffers, which is important for reproducible probe assembly and handling. The reagent’s design supports modular synthesis of imaging reagents where azide-bearing components are generated first and then coupled to complementary alkyne-functional imaging reporters under standardized click conditions.

4. Diagnostic Reagent Conjugation

Azido-PEG8-alcohol is applied in the preparation of diagnostic and analytical reagents that rely on modular conjugation to create multicomponent detection constructs. By installing an azide-bearing PEG linker, developers can standardize the incorporation of capture elements, signal-generating tags, or assay-compatible reporters through click chemistry, streamlining reagent build workflows. The PEG8 spacer is also used to manage conjugate architecture, supporting accessibility of reactive groups and improving compatibility with assay buffers used in research diagnostics and analytical chemistry applications.