Cyanine5.5 NHS ester
| Cat. # | Quantity | Price | Lead time | Buy this product |
|---|---|---|---|---|
| 17020 | 1 mg |
$139.90
|
in stock | |
| 27020 | 5 mg |
$259.90
|
in stock | |
| 47020 | 25 mg |
$489.90
|
in stock | |
| 57020 | 50 mg |
$939.90
|
in stock | |
| 67020 | 100 mg |
$1799.00
|
in stock |
Cyanine5.5 NHS ester is a reactive dye for the labeling of amino-groups in peptides, proteins, and oligonucleotides, an analog of Cy5.5® NHS ester.
Cy5.5 is a far-red (and near-infrared) emitting dye which is ideal for fluorescence measurements where background fluorescence is a concern. It is also suitable for in vivo NIR imaging experiments.
This reagent can replace NHS esters of Cy5.5® and DyLight 680.
Cy5.5 absorbance and emission spectra
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General properties
| Appearance: | dark blue to violet solid |
| Molecular weight: | 767.66 |
| CAS number: | 2375105-86-3 |
| Molecular formula: | C44H46N3BF4O4 |
| IUPAC name: | 1H-Benz[e]indolium, 2-[5-(1,3-dihydro-1,1,3-trimethyl-2H-benz[e]indol-2-ylidene)-1,3-pentadien-1-yl]-3-[6-[(2,5-dioxo-1-pyrrolidinyl)oxy]-6-oxohexyl]-1,1-dimethyl- |
| Solubility: | soluble in organic solvents (DMSO, DMF, dichloromethane), practically insoluble in water (< 1 uM, < 1 mg/L) |
| Quality control: | NMR 1H, HPLC-MS (95%) |
| Storage conditions: | Storage: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate. |
| MSDS: | Download |
| Product specifications |
Spectral properties
| Excitation/absorption maximum, nm: | 684 |
| ε, L⋅mol−1⋅cm−1: | 198000 |
| Emission maximum, nm: | 710 |
| Fluorescence quantum yield: | 0.2 |
| CF260: | 0.07 |
| CF280: | 0.03 |
Product citations
- Guo, H.; Hu, Q.; Yu, X.; Shen, L.; Dai, T.; Yang, S.; Dou, H. Functional Ligand-Mediated Tailoring of Size and Spatial Architecture in Metal-Organic Framework/Polymer Hybrids for Photothermal Applications. Journal of Colloid and Interface Science, 2026, 702, 138963. doi: 10.1016/j.jcis.2025.138963
- Song, B.; Na, Y.-G.; Kim, B. J.; Jin, M.; Song, Y. H.; Kim, D.-E.; Hwang, S.; Baek, J.-S.; Lee, H.-K.; Cho, C.-W. Platelet Membrane-Coated Poly (Lactic-Co-Glycolic Acid) Nanoparticles as a Targeting Drug Delivery System for Multidrug-Resistant Breast Cancer. IJN, 2025, 20, 8529–8545. doi: 10.2147/IJN.S517753
- Jang, K.; Kajale, S. N.; Joy, B. C.; Bono, D. C.; Neltner, B.; Sarkar, D. A Wearable Device for Continuous Monitoring of Circulating Cells at Single-Cell Resolution. npj Biosensing, 2025, 2(1), 10. doi: 10.1038/s44328-025-00032-3
- Muradova, Z.; Carmès, L.; Brown, N.; Rossetti, F.; Guthier, R.; Yasmin-Karim, S.; Lavelle, M.; Morris, T.; Guidelli, E. J.; Isikawa, M.; Dufort, S.; Bort, G.; Tillement, O.; Lux, F.; Berbeco, R. Targeted-Theranostic Nanoparticles Induce Anti-Tumor Immune Response in Lung Cancer. Journal of Nanobiotechnology, 2025, 23(1), 466. doi: 10.1186/s12951-025-03542-4
Cy® is a trademark of Cytiva.
This Product is offered and sold for research purposes only. It has not been tested for safety and efficacy in food, drug, medical device, cosmetic, commercial or any other use. Supply does not express or imply authorization to use for any other purpose, including, without limitation, in vitro diagnostic purposes, in the manufacture of food or pharmaceutical products, in medical devices or in cosmetic products.
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