Cyanine5.5 is a far red emitting dye for in vivo imaging and applications requiring low background. This Cyanine5.5 derivative contains tetrazine moiety that reacts with trans-cyclooctenes, cyclopropenes, and some strained cyclooctynes with the formation of stable conjugates.
This labeling reaction is extremely fast, and can be used in vivo.
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General properties
| Appearance: | dark blue solid | 
| Mass spec M+ increment: | 737.4 | 
| Molecular weight: | 911.96 | 
| Molecular formula: | C50H52N7F6OP | 
| Solubility: | good in DCM, DMF, DMSO | 
| Quality control: | NMR 1H, HPLC-MS (95%) | 
| Storage conditions: | Storage: 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate. | 
  Spectral properties
| Excitation maximum, nm: | 684 | 
| ε, L⋅mol−1⋅cm−1: | 209000 | 
| Emission maximum, nm: | 710 | 
| Fluorescence quantum yield: | 0.2 | 
| CF260: | 0.07 | 
| CF280: | 0.03 |