4arm PEG Acetic Acid (4-arm CM), MW 20K A multi-armed PEG derivative with a methylene (CH2) bond between the PEG and COOH groups, commonly known as acetic acid (AA) or carboxymethyl (CM ).
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.