ProductDescription
HO-PEG-COOtBuisalinearheterobifunctionalPEGderivativewithonehydroxylgroupandonecarboxylatetert-butylester.Theprotectedcarboxyl(COOH)preventsselfcouplingorpolymerizationunderstandardacid/amineoracid/hydroxylcouplingconditions.Theprotectedacidcanberegeneratedbyacidicorbasichydrolysis.