Product ID: M1278

Unit SizePriceQuantity 
  • Buy 5 for $51.49 each and save 20%

Availability: In stock


Green fluorophore standard used for labeling and in enzyme assay systems.

The lower pKa version of fluorescein (similar to Oregon GreenTM) is widely used in biological assays and for labeling cells and tissues. This dichloro-version of the popular dye fluorescein is known to have higher fluorescence emission at lower pH values as well as greater photostability, similar to AlexaFluor dyes.

Technical Data
SKU M1278
CAS Number 76-54-0
Unit Size 100mg
Absorption 495nm
Emission Wavelength 529
Detection Method Fluorescence
Molecular Formula C₂₀H₁₀Cl₂O₅
Molecular Weight 401.2
Storage Conditions Room Temperature, Desiccated

References and Citations


  • Beyazit S, Ambrosini S, Marchyk N, Palo E, Kale V, Soukka T, Tse Bui Sum B, Haupt K. (2014) "Versatile synthetic strategy for coating upconverting nanoparticles with polymer shells through localized photopolymerization by using the particles as internal light sources." Angewandte Chemie, International Edition 53(34) 8919-8923.
  • Gomes ECC, de Carvalho IMM, Diogenes ICN, de Sousa EHS, Longhinotti E. (2014) "On the incorporation of Rhodamine B and 2',​7'-​dichlorofluorescein dyes in silica: Synthesis of fluorescent nanoparticles." Optical Materials (Amsterdam, Netherlands) 36(7) 1197-1202.
  • Flores-Bellver M, Bonet-Ponce L, Barcia JM, Garcia-Verdugo JM, Martinez-Gil N, Saez-Atienzar S, Sancho-Pelluz J, Jordan J, Galindo MF, Romero FJ. (2014) "Autophagy and mitochondrial alterations in human retinal pigment epithelial cells induced by ethanol: implications of 4-​hydroxy-​nonenal. " Cell Death & Disease 5(7) e1328.
>Show more
>Show less

Click here for Newsletter articles about this product

Technical Support

Question about this product? Ask a Scientist!

We pride ourselves on the high quality of our products and want you to get the best possible results from your assays. If you have any questions about this product or need help optimizing your protocol check out the product FAQs below or ask your own question and one of our expert scientists will get back to you asap:

There are currently no frequently asked questions for this product, click the button above to ask a question