HO-PEG21-OH

• CAT Number: I016571
• CAS Number: 928211-42-1
• Molecular Formula: C42H86O22
• Molecular Weight: 943.12
• Purity: ≥95%
• Synonyms: 2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol
• InChI: InChI=1S/C42H86O22/c43-1-3-45-5-7-47-9-11-49-13-15-51-17-19-53-21-23-55-25-27-57-29-31-59-33-35-61-37-39-63-41-42-64-40-38-62-36-34-60-32-30-58-28-26-56-24-22-54-20-18-52-16-14-50-12-10-48-8-6-46-4-2-44/h43-44H,1-42H2
• InChIKey: HZYUNBJZCPLWPR-UHFFFAOYSA-N
• SMILES: C(COCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO)O

HO-PEG21-OH(CAT: I016571) is a linear polyethylene glycol (PEG) derivative with two terminal hydroxyl groups and 21 ethylene glycol repeating units. This long, hydrophilic spacer provides excellent water solubility, flexibility, and biocompatibility, making it a versatile reagent for chemical synthesis and biomedical applications. The diol functionality enables further derivatization or conjugation to a wide range of molecules, surfaces, or carriers. HO-PEG21-OH is commonly used in drug delivery systems, nanomaterials, and surface engineering, where PEGylation enhances solubility, reduces immunogenicity, and minimizes nonspecific interactions. Its defined chain length offers precise control in designing advanced biomaterials and functional linkers.