Overview
Azide-PEG-Hydroxyl (N3-PEG-OH) is a polyethylene glycol (PEG)-based linker molecule with dual functional groups: an azide (-N3) for click chemistry reactions (e.g., CuAAC with alkynes) and a hydroxyl (-OH) for further derivatization. PEG's hydrophilic nature enhances solubility, while its tunable chain length allows customization for specific applications. This compound is pivotal in bioconjugation, where it bridges biomolecules (e.g., proteins, peptides) with other entities like nanoparticles or surfaces. Its biocompatibility and non-immunogenicity make it ideal for pharmaceutical and biomedical uses, including targeted drug delivery systems and diagnostic probes.
Physical and Chemical Properties
Azide-PEG-Hydroxyl exhibits high water solubility due to PEG's ethylene oxide units, with solubility also extending to polar organic solvents like DMSO and methanol. The azide group is highly reactive in strain-promoted or copper-catalyzed azide-alkyne cycloadditions (SPAAC/CuAAC), enabling efficient bioconjugation. The hydroxyl terminus allows esterification, etherification, or other modifications, offering versatility in chemical synthesis. Thermal stability is limited; decomposition may occur above 150°C, and azide groups require careful handling to avoid explosive hazards under mechanical stress or high temperatures.
Main Applications
In drug delivery, Azide-PEG-Hydroxyl links therapeutic agents (e.g., antibodies, small molecules) to carriers like liposomes or polymeric nanoparticles, improving circulation time and targeting. It also functionalizes surfaces (e.g., gold nanoparticles, biosensors) for enhanced biocompatibility. Biotechnology leverages its click chemistry compatibility for labeling biomolecules with fluorescent dyes or affinity tags. In material science, it modifies hydrogels or scaffolds for tissue engineering, where PEG's hydrophilicity prevents protein fouling and supports cell adhesion.
Safety and Storage
Azide-PEG-Hydroxyl requires cautious handling due to potential azide-related explosivity. Avoid grinding, high heat, or friction. Use personal protective equipment (PPE) including gloves and goggles, and work in a fume hood if handling powders. Store at -20°C under inert gas (e.g., argon) to prevent moisture absorption and degradation. Solutions should be prepared freshly or kept frozen with minimal freeze-thaw cycles. Dispose of waste following local regulations for azide-containing compounds.
B2B Procurement Guide
When sourcing Azide-PEG-Hydroxyl, prioritize suppliers with ISO certification and detailed analytical reports (HPLC, NMR). Specify PEG molecular weight (e.g., 2kDa, 5kDa) and polydispersity index (PDI <1.05 for uniformity). Bulk buyers should negotiate pricing for >100g quantities, with discounts often available. Verify shipping conditions (cold chain for sensitive batches) and lead times. For research use, small-scale vendors (e.g., Sigma-Aldrich, Thermo Fisher) offer ready-to-use aliquots, while custom synthesis is viable for industrial-scale needs.
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