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46955 Sigma

Fluorescein

for fluorescence, free acid

Synonym: Acid Yellow 73

  • CAS Number 2321-07-5

  • Empirical Formula (Hill Notation) C20H12O5

  • Molecular Weight 332.31

  •  Beilstein Registry Number 94324

  •  Colour Index Number 45350

  •  EC Number 219-031-8

  •  MDL number MFCD00005050

  •  PubChem Substance ID 329757275

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Properties

Related Categories Adsorption Indicators, Analytical Reagents, Analytical/Chromatography, Biochemicals and Reagents, Detection,
grade   for fluorescence
InChI Key   GNBHRKFJIUUOQI-UHFFFAOYSA-N
fluorescence   λex 490 nm; λem 514 nm in 0.1 M Tris pH 8.0
suitability   suitable for fluorescence
Gene Information   human ... PTPN1(5770), PTPRF(5792)

Description

Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Price and Availability

Safety & Documentation

Safety Information

Symbol 
GHS07  GHS07
Signal word 
Warning
Hazard statements 
Precautionary statements 
RIDADR 
NONH for all modes of transport
WGK Germany 
3
RTECS 
LM5075000

Documents

Certificate of Analysis

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
What is Product 46955, Fluorescein, soluble in?
According to The Merck Index : 13th Edition, Fluorescein is soluble in hot alcohol and glacial acetic acid. Also, it is soluble in alkali hydroxides or carbonates. This product is insoluble in water, benzene, chloroform and ether.
How should Product 46955, Fluorescein, be stored?
We recommend storing this product at room temperature.
What is the dye content of Product 46955, Fluorescein?
According to our supplier, the dye content of pure Fluorescein is a minimum of 90%. We do not test the purity of this product since it is not one of our specifications.
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS. To access the shipping information for this material, use the link on the product detail page for the product, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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Protocols & Articles

Articles

Fluorescence Quenching Microscopy: Imaging Two-Dimensional Materials

Alane Lim and Jiaxing Huang* Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA *Email: jiaxing-huang@northwestern.edu
Keywords: Chemical vapor deposition, Deposition, Diffraction, Materials Science, Microscopy, Optical microscopy, Scanning electron microscopy, Solvents, Spectroscopy, Spin coating

Peer-Reviewed Papers
15

References

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