5-CR6G (full name: 5-Carboxyrhodamine 6G, hydrochloride, single isomer) is the free acid form of 5-carboxyrhodamine 6G single isomer.    &lamba;Ex/&lamba; Em(MeOH) = 520/546 nm  Orange red solid soluble in water (pH 7), DMF or DMSO  Store at 4°C and protect from light  C27H27ClN2O5  MW: 494.97