Cyanine5.5 NHS ester

NHS esters Cyanine5.5 Protein labeling Microscopy
Cat. # Quantity Price Lead time
17020 1 mg $110.00 in stock
27020 5 mg $210.00 in stock
47020 25 mg $410.00 in stock
57020 50 mg $695.00 5 days
67020 100 mg $1190.00 in stock
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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.

Cyanine5.5 NHS ester
Cyanine5.5 NHS ester
Cy5.5 NHS ester structure
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Cy5.5 absorbance and emission spectra

Cy5.5 absorbance and emission spectra

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Alkyne hydrazide

Bifunctional reagent containing alkyne group and hydrazide function. It reacts with aldehydes and ketones. Alkyne group can then be coupled with various azides via CuAAC reaction.

General properties

Appearance: dark blue 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

  1. Bellat, V.; Michel, A.O.; Thomas, C.; Stokol, T.; Choi, B.; Law, B. A urinary drug-disposing approach as an alternative to intravesical chemotherapy for treating non-muscle invasive bladder cancer. Cancer Research, in press. doi: 10.1158/0008-5472.CAN-21-2897
  2. Zahid, M.; McCandless, K.; Mishra, S.; Stiltner, J.; Feldman, K.; Yagi, H.; Yurko, R.; Islam, K.; Brown, J.; Frizzell, R. Novel Lung Targeting Cell Penetrating Peptides as Vectors for Delivery of Therapeutics. Research Square, preprint. doi: 10.21203/rs.3.rs-1056707/v1
  3. Diaz-Salmeron, R.; Toussaint, B.; Cailleau, C.; Ponchel, G.; Bouchemal, K. Morphology-Dependent Bioadhesion and Bioelimination of Hyaluronan Particles Administered in the Bladder. Advanced NanoBiomed Research, 2022, 2(5), 2100138. doi: 10.1002/anbr.202100138
  4. Vakhrushev, A.V.; Demin, A.M.; Krasnov, V.P. Synthesis of fluorescent GRGD peptide derivatives. AIP Conference Proceedings, 2022, 2390(1), 020083. doi: 10.1063/5.0069274
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Cy® is a trademark of Cytiva.
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