Bis-PEG6-t-butyl ester

• CAT Number: I044726
• CAS Number: 439114-12-2
• Molecular Formula: C22H42O9
• Molecular Weight: 450.56
• Purity: ≥95%
• Synonyms: tert-butyl 3-[2-[2-[2-[2-[3-[(2-methylpropan-2-yl)oxy]-3-oxopropoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoate
• InChI: InChI=1S/C22H42O9/c1-21(2,3)30-19(23)7-9-25-11-13-27-15-17-29-18-16-28-14-12-26-10-8-20(24)31-22(4,5)6/h7-18H2,1-6H3
• InChIKey: RYJCLSVRARTBFI-UHFFFAOYSA-N
• SMILES: CC(C)(C)OC(=O)CCOCCOCCOCCOCCOCCC(=O)OC(C)(C)C

Bis-PEG6-t-butyl ester（Cat No.:I044726）is a bifunctional polyethylene glycol (PEG) derivative featuring two terminal tert-butyl ester groups connected by a PEG6 spacer. The PEG6 chain provides excellent hydrophilicity, flexibility, and biocompatibility, making it suitable for biomedical and pharmaceutical applications. The t-butyl ester groups serve as protected carboxylic acids, which can be selectively deprotected under acidic conditions to reveal reactive –COOH groups for further conjugation. This compound is ideal for controlled drug release systems, hydrogel crosslinking, and surface modification, allowing precise spatial configuration and functional group presentation in advanced materials and therapeutic constructs.