Product: Fluorescein Complexone CAS No.: 1461-15-0 Formula : C30H26N2O13 Molecular weight : 622.55 g/mol Specification: Solubility 0.1% (0.1N NaOH): Clear solution Absorption maximum (0.1N NaOH) ?max: 499+/-5nm Absorptivity (A1%/1cm at ?max): >800 Loss On Drying (110C):