Tetraethylene glycol is a hydrophilic linear polyether specifically with four ethylene glycol units and terminal hydroxyl groups. It offers excellent solubility, flexibility, and reactivity, making it especially valuable as a solvent, intermediate, and spacer in drug formulation, polymer synthesis, and bioconjugation.
Polyethylene Glycol PEG Linkers > Hydroxy PEG > Polyethylene Glycol
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