8-arm PEG-COOH

Price range: $300.00 through $1,200.00

8-Arm PEG COOH is a multi-arm polyethylene glycol derivative containing eight terminal carboxylic acid (COOH) groups attached to a central core. The reactive carboxyl groups enable efficient conjugation with amine-containing biomolecules through EDC/NHS coupling chemistry, making 8-Arm PEG COOH an ideal crosslinker for hydrogel synthesis, protein conjugation, tissue engineering, drug delivery, and biomaterials research.

Product Name: 8-Arm PEG COOH
Polymer Architecture: Eight-Arm Polyethylene Glycol
Core Structure: Hexaglycerol or Tripentaerythritol Based*
Molecular Weight: 10k, 20k, 40k Da
Functional Groups: 8 × Carboxylic Acid (COOH)
Appearance: White to off-white solid
Solubility: Water, PBS, DMSO, DMF
Storage: -20°C, dry and protected from moisture
Purity: Typically ≥95%

8-Arm PEG COOH structure

Description

General Description

8-Arm PEG COOH is a multifunctional PEG derivative designed for the preparation of highly crosslinked biomaterials and advanced bioconjugates. The eight-arm architecture provides a high density of terminal carboxyl groups that can be readily activated using carbodiimide chemistry (EDC/NHS) for coupling to primary amines on proteins, peptides, antibodies, enzymes, polymers, and biomaterial surfaces.

The PEG backbone provides excellent water solubility, flexibility, biocompatibility, and minimizes nonspecific protein adsorption. Compared with linear PEG derivatives, the eight-arm architecture offers significantly higher conjugation efficiency and crosslinking density, making it particularly suitable for hydrogel fabrication, injectable biomaterials, tissue engineering scaffolds, and controlled drug delivery systems.

8-Arm PEG COOH is widely employed in hydrogel preparation, protein immobilization, nanoparticle functionalization, regenerative medicine, molecular imaging, polymer synthesis, and advanced biomaterials development.

Applications

  • Hydrogel synthesis
  • Protein conjugation
  • Antibody conjugation
  • Peptide conjugation
  • Surface modification
  • Nanoparticle functionalization
  • Tissue engineering
  • Drug delivery systems
  • Regenerative medicine
  • Biomaterials research

Features and Benefits

  • Eight terminal carboxyl groups
  • Multi-arm PEG architecture
  • High coupling efficiency
  • Compatible with EDC/NHS chemistry
  • Excellent water solubility
  • Excellent biocompatibility
  • High crosslinking density
  • Low protein adsorption
  • Suitable for hydrogel fabrication

Additional information

Molecular weight

10k, 20k, 40k

Package size

1g, 5g, 10g