Fluorescein disodium salt, Thermo Scientific™

Fluorescein disodium salt (uranin, fluorescite, acid yellow 73, CAS # 518-45-6) is the salt of the xanthene dye commonly used for fluorescent tracing.

Brand:  Thermo Scientific Alfa Aesar J61549.36

Product Code. 15474139

Description

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

General Description

• Fluorescein disodium salt is a yellow-green phthalate indicator dye that is pH-sensitive

• It has a maximum absorbance of 494nm and maximum emission of 521nm

Application

• Fluorescein disodium salt can be used as a fluorescent protein labeler

• Fluorescein is also useful for the staining of cells and organelles

Chemical Identifiers

• CAS: 518-47-8
• Molecular Formula: C₂₀H₁₀Na₂O₅
• MDL Number: MFCD00167039
• Synonym: Acid Yellow 73; C.I. 45350

Specifications

• CAS: 518-47-8
• MDL Number: MFCD00167039
• Beilstein: 3833041
• Synonym: Acid Yellow 73; C.I. 45350
• Formula Weight: 376.28

• Molecular Formula: C₂₀H₁₀Na₂O₅
• Quantity: 500g
• Merck Index: 14,4159
• Solubility Information: Soluble in water at 1mg/ml
• Chemical Name or Material: Fluorescein disodium salt