- Synonyms: 2,7-Bis[bis(carboxymethyl)aminomethyl]fluorescein, Fluorescein complexon, Fluorexonr- C30H26N2O13r- M = 622,55 g/molr- CAS [1461-15-0]r- EINECS-No.: 215-957-1r- Solub. in water: (20 ºC): sparingly solubler- Tariff number: 3204 19 00 90r- Applications: analytical chemistry, indicator, for determination of: calcium.rrSPECIFICATIONSrr0,002 M : 492 - 500 nmrAbsorptivity (A1%/1 cm; l max.): 800 - 1000 rinsoluble in NaOH : passes testrloss on drying (135 °C) : max.10 %rsuitability as complexometric indicator..............passes testr