• CAS No.：
  518044-41-2
• Synonyms：
  Mal-PEG4-Acid
  15-maleinimido-4,7,10,13-tetraoxapentadecanoic acid
  
• Purity：
  ≥95%
• MF：
  C₁₅H₂₃NO₈
• MW：
  345.3
• 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.

MAL-PEG4-COOH (also known as Mal-PEG4-acid, CAS: 518044-41-2) is a PEG linker with a maleimide group at one end and a terminal carboxylic acid group at the other. The hydrophilic PEG spacer enhances its solubility in aqueous environments. The maleimide group can react with thiol groups to form stable covalent bonds, enabling the linkage of biomolecules containing thiols. Additionally, the carboxylic acid group can react with primary amine groups in the presence of activators (such as EDC or HATU), facilitating the formation of a stable amide bond for efficient bioconjugation.

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