RB-PEG-SH (MW 2000)

RB-PEG-SH (MW 2000) (Rhodamine B-PEG-SH (MW 2000) ) is a fluorescent dye comprised of Rhodamine B, PEG, and a thiol (SH) group. The highly reactive SH can form stable thioether bonds with various functional groups, such as maleimide, exhibiting excitation/emission spectra of 546/610 nm.