• CAS No.：
  37860-51-8
• Synonyms：
  Bis-Tos-PEG4
  Tetraethylene glycol di(p-toluenesulfonate)
  1,11-Bis(tosyloxy)-3,6,9-trioxaundecane
  2,2'-(Ethylenedioxy)triethyl ditosylate
  
• Purity：
  ≥95%
• MF：
  C₂₂H₃₀O₉S₂
• MW：
  502.6
• 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.

Tos-PEG4-Tos is a bifunctional PEG linker featuring two tosyl groups connected by a PEG4 spacer. The hydrophilic PEG chain enhances solubility in aqueous environments, making it suitable for a range of biological and chemical applications. The tosyl groups serve as excellent leaving groups, facilitating efficient nucleophilic substitution reactions and enabling versatile modifications in bioconjugation and organic synthesis.

Biopharma PEG offers a wide range of PEG linkers on both lab and commercial scales. Email at sales@biochempeg.com and start using a superior product for your next product R&D project.