For some applications, 5-(and-6)-carboxyrhodamine (5(6)-CR 110) is a superior alternative to the widely used green fluorescent dye 5-(and-6)-carboxyfluorescein. The dye is insensitive to pH between 4 and 9 and is much more photostable than fluorescein.     &lamba;Ex/&lamba;Em (MeOH) = 502/524 nm  Orange red solid soluble in H2O (pH>6), DMF or DMSO  Store at 4°C and protect from light  C21H15ClN2O5  MW: 410.81