sulfo-Cyanine5 NHS ester

Cat. # Quantity Price Lead time
13320 1 mg
$99.00
in stock
23320 5 mg
$159.90
in stock
43320 25 mg
$489.90
in stock
53320 50 mg
$809.90
in stock
63320 100 mg
$1299.00
in stock
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Water-soluble Cyanine5 succinimidyl ester (SE), an equivalent of Cy5® NHS ester, for the labeling of various amine-containing molecules in aqueous phase without use of any organic co-solvent. This product is, therefore, particularly useful for the labeling of proteins that denature in the presence of organic co-solvents, as well as for proteins with low solubility.

sulfo-Cyanine 5 is an analog of Cy5®, one of the most popular fluorophores, which is compatible with various equipment such as plate readers, microscopes, and imagers.

This dye is highly hydrophilic and water-soluble. A non-sulfonated analog is also available.

Can be used as a replacement for Cy5®, DyLight 649 for all applications.

sulfo-Cyanine5 absorbance and emission spectra

sulfo-Cyanine5 absorbance and emission spectra

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General properties

Appearance: dark blue powder
Molecular weight: 777.95
CAS number: 2230212-27-6; 146368-14-1 (N-Ethyl)
Molecular formula: C36H40N3KO10S2
Solubility: very good in water, good in DMF and DMSO
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: 646
ε, L⋅mol−1⋅cm−1: 271000
Emission maximum, nm: 662
Fluorescence quantum yield: 0.28
CF260: 0.04
CF280: 0.04

Product citations

  1. Leurs, Y.; Hout, W. V. D.; Gardin, A.; Dongen, J. V.; Hest, J. V.; Grisoni, F.; Brunsveld, L. Automated Navigation of Condensate Phase Behavior with Active Machine Learning. ChemRxiv, 2025, preprint. doi: 10.26434/chemrxiv-2024-frnj3
  2. Shevtsov, M.; Yudintceva, N.; Bobkov, D.; Likhomanova, R.; Nechaeva, A.; Mikhailova, E.; Oganesyan, E.; Fedorov, V.; Kurkin, A.; Lukacheva, A.; Fofanov, G.; Kim, A.; Fedorov, E.; Sitovskaya, D.; Ulitin, A.; Mikhailova, N.; Anufriev, I.; Istomina, M.; Murashko, E.; Kessenikh, E.; Aksenov, N.; Vakhitova, Y.; Samochernykh, K.; Pitkin, E.; Shlyakhto, E.; Combs, S. E. RAS70 Peptide Targets Multiforme Glioblastoma by Binding to the Plasma Membrane Heat Shock Protein HSP70. Front. Oncol., 2025, 15. doi: 10.3389/fonc.2025.1543657
  3. Soeiro, J. F.; Pereira, R. A.; Oliveira‐Silva, R.; Sousa, F. L.; Gaspar, V. M.; Mano, J. F.; Millán, Á.; Innocenti, C.; Mariani, M.; Lascialfari, A.; Silva, N. J. O. 3D Temperature Mapping During Photothermal Therapy in Cellular Assemblies. Small Structures, 2025, 6(6), 2400658. doi: 10.1002/sstr.202400658
  4. Molina-Solís, J.; Gama, P.; Chauhan, K.; Rodríguez-Hernández, A. G.; Vazquez-Duhalt, R. Virus-Based Enzymatic Nanoreactors with Acid Alpha-Glucosidase for the Potential Treatment of Pompe Disease. Mater. Adv., 2025, 6(5), 1613–1620. doi: 10.1039/D4MA00943F
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