Hydroxy-PEG4-t-butyl ester is a PEG analogue containing a hydroxyl group with a t-butyl ester. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The t-butyl protected carboxyl group can be deprotected under acidic conditions.

纯度：≥98%

CAS：518044-32-1