TCI C0426 Cryptocyanine (CAS 4727-50-8) is a polymethine cyanine dye with strong absorption in the red to near-infrared region. It is commonly used as a laser dye and as a saturable absorber for Q-switching applications in pulsed laser systems. Researchers also apply it in nonlinear optics, energy-transfer studies, and near-infrared absorption or fluorescence measurements. The dye is light sensitive, so it should be stored in a cool, dark place and handled in amber or foil-wrapped vessels for reliable spectroscopic results.
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- Liu et al. (2023). Revisiting Cryptocyanine Dye, NK-4, as an Old and New Drug: Review and Future Perspectives. International Journal of Molecular Sciences doi:10.3390/ijms24054411
- Domahidy et al. (2026). Cryptocyanine‐Based Fluorescent Probes for DNA Detection: Controlling Solubility and Aggregation Through Side Chain Design. Advanced Sensor Research doi:10.1002/adsr.202500139
- Jung et al. (2017). A Mitochondria-Targeted Cryptocyanine-Based Photothermogenic Photosensitizer. Journal of the American Chemical Society doi:10.1021/jacs.7b04263
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