Carboxy-PEG4-phosphonic acid ethyl ester contains a carboxylic acid end group and a phosphonic acid ethyl ester moiety. The carboxylic acid can react with primary amines in the presence of activators such as EDC and HATU to form a stable amide bond. The hydrophilic PEG linker increases the water solubility of the compound in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
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