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C.I.No.45350 Sodium fluorescein is used as a fluorescent tracer to study blood-brain barrier (BBB) and blood-spinal cord barrier (BSCB) permeability in rodent models.
Acid Yellow 73, NaFl, NaFluo, Sodium fluorescein, Uranine


25 g (00025)

100 g (00100)

1000 g (01000)

1PB1200060 1PB1200200
Article No. 03856 Grade
Purity CAS No. 518-47-8
Molecular Formula C20H10Na2O5 Molecular Weight 376.28
H.S. Code 3204.9000 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour Dark red crystalline
Odour Odorless pH value 8.3 at 10 g/l at 20 °C
Melting point/ Freezing point [°C] > 300 °C Solubility in water [% weight] 500 g/l at 20 °C
Partition coefficient Log Pow octanol / water at 20°C -0.67


Appearance Orange-red to green-brown to dark brown powder Identity (IR) Confirms to structure
Loss on drying (at 105°C) Max 10.0% Absorption maxima (in buffer pH 8.0) 488 to 491 nm
UV absorbance ratio (P-15/P+15) 1.2 - 1.7 Specific absorptivity 1%/1cm (at λmax; buffer pH 8.0) Min 1700

Safety Information and Hazard Symbols

Safety Statement: 22-24/25
Revision Date: 20-Mar-2017

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