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Chromeo™ Dyes – Chromeo 488, Chromeo 494, Chromeo 546 and Chromeo 642 – 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. For your labeling convenience, Chromeo Dyes are offered in a variety of chemistries.
Figure 1: Absorption and emission spectra of the Chromeo dyes.
Black = Chromeo 488; Red = Chromeo 494; Blue = Chromeo 546; Green = Chromeo 642.
| Dye | Absorption | Emission | ε L/(mol-cm) | Quantum Yield* | Stokes shift |
|---|---|---|---|---|---|
| Chromeo™ 488 | 488 nm | 517 nm | 73,000 | 38% | 29 nm |
| Chromeo™ 494 | 494 nm | 628 nm | 55,000 | 25% | 124 nm |
| Chromeo™ 546 | 545 nm | 561 nm | 98,800 | 10% | 16 nm |
| Chromeo™ 642 | 642 nm | 660 nm | 180,000 | 15% | 18 nm |
