• Synonyms：
  4-ArmPEG-Acid
  
• Purity：
  ≥95%
• Recommended Storage Condition：
  Store at -5°C,keep in dry and avoid sunlight.
• Uses：
  

Premium Multi-Arm PEG Derivative for Hydrogel Networks & Multi-Valent Bioconjugation

4-ArmPEG-COOH (4-Arm PEG Carboxylic Acid / 4-Arm PEG Acid) is a multiarm PEG derivative featuring carboxylic acid (–COOH) groups at the end of each of its four arms, all connected to a central pentaerythritol core. This unique star-shaped structure imparts high water solubility, excellent biocompatibility, and multiple reactive sites, making it highly valuable for a range of biomedical and material science applications. The terminal carboxylic acid groups allow for easy conjugation with amine-containing molecules using standard peptide coupling reagents, facilitating the synthesis of complex biomaterials and functional coatings

4-ArmPEG-COOH is widely used for high-density functionalization, bio-adhesive tissue sealants, 3D cell culture hydrogel matrices, and multi-valent drug delivery.

Related Products & Categories

• ● Category: Multi-Arm PEG Derivatives | PEG Hydrogels 
• ● Amine Hydrogel Crosslinkers: 4-Arm PEG-NH2 | 8-Arm PEG-NH2
• ● Multi-Arm NHS Esters: Y-shape-PEG-NHS | 4-Arm PEG-SG | 8-Arm PEG-SG | 4-Arm PEG-NHS
• ● Thiol Crosslinking Partners: 4-Arm PEG-SH | 8-Arm PEG-SH
• ● 8-Arm & Linear Carboxylic Acid PEGs:  8-ArmPEG-COOH | mPEG-COOH | SH-PEG-COOH | Amine-PEG-COOH | NHS-PEG-COOH