CF(TM)640R is a rhodamine-based far-red fluorescent dye with excitation and emission maxima very similar to those of Cy(R)5 and Alexa Fluor(R) 647. CF(TM)640R is much brighter than Cy(R)5 and at least as bright as Alexa Fluor(R) 647. A major advantage of CF(TM)640R over Cy(R) 5 and Alexa Fluor(R) 647 is its exceptional photostability. Cy(R)5 and Alexa Fluor(R) 647 are cyanine-based dyes and, like other cyanine dyes in general, have intrinsically poor photostability. CF(TM)640R is also far brighter and more photostable than Atto(TM) 647N, another spectrally similar dye frequently used in single-molecule imaging. The combination of excellent brightness and photostability makes CF(TM)640R ideal for confocal microscopy, single- molecule imaging and other demanding applications based on fluorescence detection.
Purity: >=90% (HPLC)
Storage: -20C
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