330000 Aldrich

Rose bengal

Dye content 95 %

Synonym: 4,5,6,7-Tetrachloro-2′,4′,5′,7′-tetraiodofluorescein disodium salt, Acid Red 94, Bengal Rose B sodium salt, Rose Bengal sodium salt



Related Categories Cell Biology, Hematology and Histology, Q-R, Stains & Dyes, A to Z, Stains and Dyes More...
composition   Dye content, 95%
absorption   λmax 549 nm


Frequently Asked Questions

Frequently Asked Questions are available for this Product.


1, 5 g in glass bottle

Price and Availability

Tissue Diagnostics

All labs need water

Biomedical Applications
Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Certificate of Origin

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:
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. 
What is the solubility of Rose Bengal, Product 330000?
According to The Sigma-Aldrich Handbook of Stains, Dyes and Indicators, Rose Bengal is soluble in water at 100 mg/mL, ethanol at 30 mg/mL and 2-methoxyethanol at 60 mg/mL. Conn's Biological Stains (10th Edition) states Rose Bengal has a solubility of 36% in water and 8% in ethanol.
What types of applications can Product 330000, Rose bengal be used for?
According to the literature, Rose bengal has been used in a used in neutrophil adherence test and as a generator of singlet oxygen when exposed to laser energy. See: McKinnon, J. , Expt. Med., 164, 1864, (1986) and Gamble and Vadas, Science, 242, 97, (1988).
What is the quantum yield of Rose bengal, Product 330000?
According to the literature, the quantum yield of Rose bengal is 0.11. See: Seybold, P.G., et al., Calorimetric, photometric and lifetime determinations of fluorescence yields of fluorescein dyes, Photochem. Photobiol., 9, 229-242 (1969).
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