Thermo Scientific Chemicals Fluorescein, disodium salt, pure

Catalog No.	Quantity	Packaging
AC173241000	100 g	Glass Bottle
AC173245000	500 g	Glass Bottle
AC173240025	2.5 kg	Plastic drum

Catalog No. AC173241000 Supplier Thermo Scientific Chemicals Supplier No. 173241000

Description

CAS: 518-47-8 | C20H10Na2O5 | 376.28 g/mol

This Thermo Scientific Chemicals brand product was originally part of the Acros Organics product portfolio. Some documentation and label information may refer to the legacy brand. The original Acros Organics product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Indicator

Specifications

Chemical Identifiers

• CAS: 518-47-8
• Molecular Formula: C20H10Na2O5
• Molecular Weight (g/mol): 376.28
• MDL Number: MFCD00167039
• InChI Key: NJDNXYGOVLYJHP-UHFFFAOYSA-L
• IUPAC Name: disodium 2-(6-oxido-3-oxo-3H-xanthen-9-yl)benzoate
• SMILES: [Na+].[Na+].[O-]C(=O)C1=CC=CC=C1C1=C2C=CC(=O)C=C2OC2=CC([O-])=CC=C12

• Absorbance: 1700 (at lambda max.) min.
• Melting Point: 320.0°C
• Absorption Ratio: 1.2 to 1.7
• Beilstein: 19, V,6, 456
• Merck Index: 15, 4192
• Synonym: Acid Yellow 73, Fluorescein, water soluble, Uranine, C.I. 45350
• Solubility Information: Solubility in water: 500g/L (20°C). Other solubilities: slightly soluble in alcohol
• Infrared Spectrum: Authentic
• Lambda Max: 488 to 491nm (in buffer pH 8)
• Formula Weight: 376.27
• Loss on Drying: 10% (105°C) max.
• Grade: Pure
• Packaging: Glass Bottle
• Color: Brown to Orange/Red or Brown/Green
• Quantity: 100 g
• Physical Form: Powder
• Chemical Name or Material: Fluorescein, disodium salt

Safety and Handling

Hazard Category	Warning
Precautionary Statement	Emergency Overview Irritating to eyes. May cause skin and respiratory tract irritation. NFPA Health: 2 Flammability:

SDS

RUO – Research Use Only