A modification reagent containing a long 4-unit polyethylene glycol (PEG4) spacer arm and a terminal primary hydroxyl group.
DBCO-PEG4-hydroxyl is a polyethylene glycol-containing reagent and a terminal primary hydroxyl (–OH) that reacts with a variety of functional groups. The PEG spacer arm is hydrophilic and provides greater solubility to labelled molecules compared to reagents having only hydrocarbon spacers.
DMF, DMSO, DCM, THF, Chloroform
White to slightly grey crystalline