Merck Fluorescein (free acid)

Fluorescein (free acid)

Dye content 95 %

C20H12O5

Quality Level

200

form

powder

구성

Dye content, 95%

mp

320 °C (lit.)

solubility

1 M NaOH: 1 mg/mL

λmax

496 nm

ε (extinction coefficient)

≥12000 at 282-286 nm
≥39000 at 236-240 nm
≥70000 at 488-492 nm

application(s)

diagnostic assay manufacturing
hematology
histology

저장 온도

room temp

SMILES string

Oc1ccc2c(Oc3cc(O)ccc3C24OC(=O)c5ccccc45)c1

InChI

1S/C20H12O5/c21-11-5-7-15-17(9-11)24-18-10-12(22)6-8-16(18)20(15)14-4-2-1-3-13(14)19(23)25-20/h1-10,21-22H

InChI key

GNBHRKFJIUUOQI-UHFFFAOYSA-N

Fluorescein (free acid) is a xanthene dye. Fluorescein (free acid) molecule can be divided into two parts. One part contains xanthene moiety which acts as fluorophore and the other part of the molecule bears benzene moiety which is the fluorescence-controlling moiety. Principle involved in the modulation of its fluorescence properties has been described. Its uptake by zeolite NaX and the mesoporous zeotype MCM-41 has been investigated. It is widely employed as quantum yield standard.