Fluo-2 (potassium salt)

Fluo-2 is a cell-impermeable fluorescent calcium indicator. It binds to calcium (Kd = 290 nM) and displays excitation/emission maxima of 490/515 nm, respectively. Fluo-2 is also available in a cell-permeable form (Cay-35758).Formal Name: N-[2-[2-[2-[bis(carboxymethyl)amino]-5-(6-hydroxy-3-oxo-3H-xanthen-9-yl)phenoxy]ethoxy]-4-methylphenyl]-N-(carboxymethyl)-glycine, pentapotassium salt. Synonyms: Fluo-2 HA, Fluo-2 High Affinity. Molecular Formula: C36H27N2O13 . 5K. Formula Weight: 891.1. Purity: >95%. Emission: 515 nm. Excitation: 490 nm. lambdamax: 254 nm. SMILES: O=C1C=CC2=C(C3=CC(OCCOC4=CC(C)=CC=C4N(CC([O-])=O)CC([O-])=O)=C(N(CC([O-])=O)CC([O-])=O)C=C3)C5=C(C=C(C=C5)[O-])OC2=C1.[K+].[K+].[K+].[K+].[K+]. InChi Code: InChI=1S/C36H32N2O13.5K/c1-20-2-8-26(37(16-32(41)42)17-33(43)44)30(12-20)49-10-11-50-31-13-21(3-9-27(31)38(18-34(45)46)19-35(47)48)36-24-6-4-22(39)14-28(24)51-29-15-23(40)5-7-25(29)36,,,,,/h2-9,12-15,39H,10-11,16-19H2,1H3,(H,41,42)(H,43,44)(H,45,46)(H,47,48),,,,,/q,5*+1/p-5. InChi Key: HKAHBVSIWRSDKQ-UHFFFAOYSA-I.