Tetrazines demonstrate exceptionally fast cycloaddition kinetics (up to 30 000 M-1 s-1) with trans-cyclooctenes (TCO) as the dienophile, the fastest kinetics ever reported for any bioorthogonal reaction. In addition, inverse-Electron-Demand Diels-Alder reaction of tetrazines trans-cyclooctenea forms a stable covalent bond and does not require Cu-catalyst or elevated temperatures.
AZDye 660R is a bright and photostable far-red dye that emits fluorescence at about 685 nm in the borderline spectral region between far-red and near-IR. Although the absorption maximum is at around 665 nm, this dye can be sufficiently excited by the 633 or 635 nm laser. AZDye 660R dye is water soluble and pH-insensitive from pH 4 to pH 10. AZDye 660R is a rhodamine-based dye, and like rhodamine dyes in general, it is exceptionally photostable (Figure 1). The superior photostability and excellent brightness of AZDye 660R make the dye an ideal choice for confocal microscopy and other demanding applications.
Unit Size | 1 mg, 5 mg, 25 mg |
---|---|
Abs/Em Maxima | 665/690 nm |
Extinction Coefficient | 92,000 |
Flow Cytometry Laser Line | 633 or 635 nm |
Microscopy Laser Line | 633 or 635 nm |
Spectrally Similar Dyes | Alexa Fluor® 660, CF® 660R |
Molecular weight | 913.05 (protonated) |
CAS | N/A |
Solubility | Water, DMSO, DMF |
Purity | >95% (HPLC) |
Appearance | Blue solid |
Storage Conditions | -20°C. Desiccate |
Shipping Conditions | Ambient temperature |
Applicable patents and legal notices are available at legal notices.
Stay in the Loop. Join Our Online Community
Products
Ordering
About Us
Application
Resources
©Vector Laboratories, Inc. 2025 All Rights Reserved.
To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions. Privacy Statement
How do I Request a Quote?
To request a quote for products: