FDP [Fluorescein diphosphate, tetraammonium salt] *CAS 217305-49-2*

Absorbance (nm): 487 Correction Factor (260 nm): 0.32 Correction Factor (280 nm): 0.35 Extinction coefficient (cm^-1 M^-1): 80000 (0.1N NaOH) Excitation (nm): 498 Emission (nm): 517 Quantum yield: 0.7900 (EtOH (neutral)), 0.95 (0.1N NaOH). Upon interaction with phosphatases the colorless and non-fluorescent FDP is hydrolyzed to highly fluorescent fluorescein, which exhibits excellent spectral properties that match the optimal detection window of most fluorescence instruments that are equipped with the Argon laser excitation. Solvent: Water.