NH2-PEG-COOH

NH2-PEG-COOH, average M_N 20,000, cross-linking reagent amine reactive, cross-linking reagent carboxyl reactive

NH2-PEG-COOH, average M_N 2,000

NH2-PEG-COOH, average M_N 5,000

NH2-PEG-COOH, average M_N 10,000