Cyanine5 hydrazide is a reactive dye for the labeling of aldehydes and ketones, an analog of Cy5® hydrazide.
This dye reacts smoothly and nearly quantitatively with various carbonyl groups encountered in biomolecules. Examples are proteins subjected to oxidative stress, glycosylated proteins pre-activated by periodate oxidation (including antobodies), and oligonucleotides with aldehyde moieties.
Cyanine5 hydrazide replaces carbonyl-reactive Cy5®, Alexa Fluor 647, DyLight 649 dyes.
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General properties
| Appearance: | dark blue powder | 
| Molecular weight: | 569.61 | 
| Molecular formula: | C32H42Cl2N4O | 
| Solubility: | moderate solubility in water, good in polar organic solvents (DMF, DMSO, alcohols) | 
| 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: | 646 | 
| ε, L⋅mol−1⋅cm−1: | 250000 | 
| Emission maximum, nm: | 662 | 
| Fluorescence quantum yield: | 0.2 | 
| CF260: | 0.03 | 
| CF280: | 0.04 |