PEG sulfonic acid linker has improved aqueous solubility.
AxisPharm provides monofunctional or heterobifunctional PEG Sulfonic acid reagents with various functional groups, such as Amine (NH2), Thiol (SH), Azide (N3), NHS ester, Maleimide (Mal), Carboxylic Acid (COOH), AlKyne, Silane, Biotin, DBCO, DSPE, etc.