Fluorescein diacetate

Fluorescein diacetate is a cell-permeable fluorogenic probe to quantify cell viability. It is cleaved by intracellular esterases to produce fluorescein which displays excitation/emission maxima of 490/520 nm, respectively.Formal Name: 3',6'-bis(acetyloxy)-spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one. CAS Number: 596-09-8. Synonyms: 3',6'-Diacetylfluorescein, FDA, MFCD 5062, NSC 4726, NSC 667259. Molecular Formula: C24H16O7. Formula Weight: 416.4. Purity: >98%. Emission: 520 nm. Excitation: 490 nm. Formulation: (Request formulation change), A solid. Solubility: DMF: 5 mg/ml, DMSO: 1 mg/ml. lambdamax: 220 nm. SMILES: O=C1OC2(C3=C1C=CC=C3)C4=CC=C(C=C4OC5=CC(OC(C)=O)=CC=C52)OC(C)=O. InChi Code: InChI=1S/C24H16O7/c1-13(25)28-15-7-9-19-21(11-15)30-22-12-16(29-14(2)26)8-10-20(22)24(19)18-6-4-3-5-17(18)23(27)31-24/h3-12H,1-2H3. InChi Key: CHADEQDQBURGHL-UHFFFAOYSA-N.