5(6)-Carboxy-X-rhodamine-C5-maleimide is a long wavelength thiol-reactive rhodamine dye . The C5 linker molecule enhances the fluorescence after the dye is conjugated to proteins.

• l_ex\l_em (MeOH) = 568/595 nm.
• Red solid soluble in DMF or DMSO. Store at 20?C and protect from light, especially in solution.
• C₄₂H₄₂N₄O₆.
• Mwt: 698.81.