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Chromeo™ Dyes – Chromeo 488, Chromeo 494, Chromeo 505, Chromeo 546 and Chromeo 642 – are bright fluorescent labels that replace Alexa Fluor*, DyLight* or Cy*-dyes. They exhibit superior luminescence properties, broad Stokes shifts, stability towards photobleaching and pH, and low cell toxicity. In addition, they are compatible with most excitation sources including diode lasers, LEDs, tungsten lamps and xenon arc lamps.
Chromeo™ Dye advantages
- High intensity
- Photostability – the combination with MAX Stain™ reagents provides optimal fluorescent stability for multiple exposures and increased exposure time
- Room temperature incubations
- pH insensitive
- Low background
- Easy to use – no harsh chemicals required for conjugation
Reactive fluorescent Chromeo Dyes serve as bright labels for antibodies and other biomolecules, enabling detection in immunofluorescence, high content screening, ELISA, FRET applications or flow cytometry.
Streptavidin conjugated Chromeo Dyes (15513, 15213, and 15313) have been discontinued.
To receive more detailed information and application data about individual Chromeo dyes, simply click on the name of the Chromeo dye of your choice in the table below. To see a larger spectra image, click on the spectrum of your choice.
| Dye | Absorption | Emission | Spectra | ε L/(mol-cm) | Stokes shift |
|---|---|---|---|---|---|
| Chromeo™ 488 | 488 nm | 517 nm |  |
73,000 | 29 nm |
| Chromeo™ 494 | 494 nm | 628 nm |  |
55,000 | 134 nm |
| Chromeo™ 505 | 505 nm | 526 nm |  |
70,000 | 21 nm |
| Chromeo™ 546 | 545 nm | 561 nm |  |
98,800 | 16 nm |
| Chromeo™ 642 | 642 nm | 660 nm |  |
180,000 | 18 nm |
| Table 1: Properties of Chromeo Dyes. |
To ensure that you get the best results possible, we highly recommend that you use Chromeo™ Dyes together with our MAX Stain™ Immunofluorescence Tools, as those components have been formulated to optimize the performance of the Chromeo™ Dyes.
| Name | Format | Cat No. | Price | |
|---|---|---|---|---|
| Chromeo™ 488 Alkyne | 1 unit | 15189 | Get Quote | |
| Chromeo™ 494 Alkyne | 1 unit | 15190 | Get Quote | |
| Chromeo™ 546 Alkyne | 1 unit | 15191 | Get Quote | |
| Chromeo™ 642 Alkyne | 1 unit | 15192 | Get Quote | |
| Chromeo™ 494 Azide | 1 unit | 15193 | Get Quote | |
| Chromeo™ 546 Azide | 1 unit | 15194 | Get Quote | |
| Chromeo™ 642 Azide | 1 unit | 15195 | Get Quote | |
| Chromeo™ 494 NHS-Ester | 1 unit | 15196 | Get Quote | |
| Chromeo™ 505 NHS-Ester | 1 unit | 15197 | Get Quote | |
| Chromeo™ 546 NHS-Ester | 1 unit | 15198 | Get Quote |
