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Fluorescein sodium, C.I. 45350, EssentQ®

- Synonyms: 3',6'-Dihydroxyspiro-[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, Resorcinolphthalein
- C20H10Na2O5
- M = 376,28 g/mol
- CAS [518-47-8]
- EINECS-No.: 208-253-0
- Solub. in water: (20 ºC): 500 g/l
- Melting point: > 360 ºC
- LD 50 (oral, rat): 6721 mg/kg
- GHS-signal word: Warning
- GHS-H sentences: H312 - H332
- GHS-P sentences: P261 - P280 - P321 - P304+P340 - P312 - P501a
- Tariff number: 3204 90 00 00
- Applications: analytical chemistry, indicator.

SPECIFICATIONS
assay (on dried sample): min. 85 %
identity (IR-spectrum): passes test
Absorption maximum l (in H2O): 488 - 491 nm
arsenic (As): max. 0,005 %
cadmium (Cd): max. 0,05 %
copper (Cu): max. 0,01 %
lead (Pb): max. 0,01 %
loss on drying (110 ºC): max. 10 %