• CAT Number: I018308
  • CAS Number: 37860-51-8
  • Molecular Formula: C₂₂H₃₀O₉S₂
  • Molecular Weight: 502.6
  • Purity: ≥95%
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Bis-Tos-PEG4 (CAT: I018308) is a compound consisting of a polyethylene glycol (PEG) linker with four ethylene glycol units and two tosyl (Tos) groups attached. The PEG linker provides water solubility and flexibility, making it suitable for various biomedical applications. The tosyl groups serve as reactive handles for further functionalization or conjugation with other molecules or surfaces. Bis-Tos-PEG4 is commonly used in bioconjugation chemistry to link biomolecules or drugs to specific targets or surfaces.

Catalog Number I018308
CAS Number 37860-51-8
Molecular Formula


Purity 95%

[1]. An S, et al. Small-molecule PROTACs: An emerging and promising approach for the development of targeted therapy drugs. EBioMedicine. 2018 Oct;36:553-562.

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