• CAS No.：
  1334177-87-5
• Synonyms：
  Cbz-N-amido-PEG8-COOH
  Cbz-N-amido-PEG8-acid
  CBZ-NH-PEG8-Propionic acid
  
• Purity：
  ≥95%
• MF：
  C₂₇H₄₅NO₁₂
• MW：
  575.646
• Recommended Storage Condition：
  Store at -5°C,keep in dry and avoid sunlight.
• Uses：
  Applicated in medical research, drug-release, nanotechnology and new materials research, cell culture. In the study of ligand, polypeptide synthesis support, a graft polymer compounds, new materials, and polyethylene glycol-modified functional coatings and other aspects of the active compound.

CBZ-NH-PEG8-COOH (CBZ-N-amido-PEG8-acid) is a heterobifunctional PEG linker containing a CBZ-protected amine and a terminal carboxylic acid. The CBZ group offers selective protection during peptide synthesis and can be removed under mild hydrogenation conditions. The terminal COOH group readily reacts with amines in the presence of coupling agents such as EDC or HATU to form stable amide bonds. This PEG linker provides a hydrophilic spacer that improves solubility and flexibility in bioconjugation, peptide modification, and supramolecular assembly.

Biopharma PEG supplies high-purity CBZ-NH-PEG8-COOH from gram to multi-kilogram GMP-grade quantities, supporting research, scale-up, and custom synthesis needs.