Amino-PEG9-Boc

• CAT Number: I014119
• CAS Number: 1818294-44-8
• Molecular Formula: C25H51NO11
• Molecular Weight: 541.67
• Purity: ≥95%
• Synonyms: tert-butyl 3-[2-[2-[2-[2-[2-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoate
• InChI: InChI=1S/C25H51NO11/c1-25(2,3)37-24(27)4-6-28-8-10-30-12-14-32-16-18-34-20-22-36-23-21-35-19-17-33-15-13-31-11-9-29-7-5-26/h4-23,26H2,1-3H3
• InChIKey: PPVFMACVSAAZFR-UHFFFAOYSA-N
• SMILES: CC(C)(C)OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCOCCN

Amino-PEG9-Boc（Cat No.:I014119）is a heterobifunctional polyethylene glycol linker bearing one free primary amine and one Boc-protected amine separated by a nine-unit PEG chain. The exposed amine readily couples to NHS esters, activated carboxyls (EDC/NHS), isocyanates, epoxides, and aldehydes (reductive amination) to form stable linkages. The Boc group serves as a removable protecting group; mild acid deprotection reveals a second amine to generate a diamine for sequential conjugation. The PEG9 spacer enhances aqueous solubility, provides flexible, low-fouling spacing, and reduces steric hindrance in protein labeling, surface modification, and polymer assembly and material synthesis.