HO-PEG-COOH is a linear heterobifunctional PEG derivative with one hydroxyl group and one carboxyl group. It is a useful cross-linking reagent with a PEG spacer. There is a methylene (CH2) linkage between PEG and COOH, often called AA (acetic acid) or CM (carboxyl methyl). Heterobifunctional PEG products with other carboxilic acid such as GA (glutaric acid), SA (succinic acid), GAA (glutaramide acid), and SAA (succinamide acid) may be offered through our custom synthesis service.
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