Description_x000D_ General description_x000D_ CF™640R is a rhodamine-based far-red fluorescent dye with excitation and emission maxima very similar to those of Cy®5 and Alexa Fluor® 647. CF™640R is much brighter than Cy®5 and at least as bright as Alexa Fluor® 647. A major advantage of CF™640R over Cy® 5 and Alexa Fluor® 647 is its exceptional photostability. Cy®5 and Alexa Fluor® 647 are cyanine-based dyes and, like other cyanine dyes in general, have intrinsically poor photostability. CF™640R is also far brighter and more photostable than Atto™ 647N, another spectrally similar dye frequently used in single-molecule imaging. The combination of excellent brightness and photostability makes CF™640R ideal for confocal microscopy, single- molecule imaging and other demanding applications based on fluorescence detection._x000D_ Features and Benefits_x000D_ 1. Has the best photostability among dyes with Cy®5-like spectra. 2. Yields highly fluorescent protien conjugates. 3. Very water-soluble and pH-insensitive._x000D_ Preparation Note_x000D_ Protect from light and moisture_x000D_ Reconstitution_x000D_ Dissolve in DMSO_x000D_ Legal Information_x000D_ This product is distributed by Sigma-Aldrich Co. under the authorization of Biotium, Inc. This product is covered by one or more US patents and corresponding patent claims outside the US patents or pending applications owned or licensed by Biotium, Inc. including without limitation: 12/334,387; 12/607,915; 12/699,778; 12/850,578; 61/454,484. In consideration of the purchase price paid by the buyer, the buyer is hereby granted a limited, non-exclusive, non-transferable license to use only the purchased amount of the product solely for the buyer’s own internal research in a manner consistent with the accompanying product literature. Except as expressly granted herein, the sale of this product does not grant to or convey upon the buyer any license, expressly, by implication or estoppel, under any patent right or other intellectual property right of Biotium, Inc. Buyer shall not resell or transfer this product to any third party, or use the product for any commercial purposes, including without limitation, any diagnostic, therapeutic or prophylactic uses. This product is for research use only. Any other uses, including diagnostic uses, require a separate license from Biotium, Inc. For information on purchasing a license to use this product for purposes other than research, contact Biotium, Inc., 3159 Corporate Place, Hayward, CA 94545, Tel: (510) 265-1027. Fax: (510) 265-1352. Email: btinfo@biotium.com._x000D_ ALEXA FLUOR is a registered trademark of Life Technologies_x000D_ Atto is a trademark of Atto-Tec GmbH_x000D_ CF is a trademark of Biotium, Inc._x000D_ Cy is a registered trademark of Cytiva_x000D_ Disclaimer_x000D_ Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.