Chloro-PEG4-acid is a PEG linker containing a chloride group and a terminal carboxylic acid. The PEG4 linker improves water solubility. The chloride (Cl) is a good leaving group for nucleophilic substitution reactions. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g., EDC, or HATU) to form a stable amide bond. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
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