Cyanine5.5 NHS ester

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 in stock
67020 100 mg $1190.00 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®, Alexa Fluor 680, and DyLight 680.

Cy5.5 absorbance and emission spectra

Cy5.5 absorbance and emission spectra

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General properties

Appearance: dark blue solid
Molecular weight: 767.66
CAS number: 1469277-96-0, 2054318-82-8 (chloride); 1469541-53-4, 1874250-60-8 (without anion)
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 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. Hyun, H.; Yoo, Y.; Kim, S.Y.; Ko, H.S.; Chun, H.J.; Yang, D.H. Optimization of cRGDfK Ligand Concentration on Polymeric Nanoparticles to Maximize Cancer Targeting. Journal of Industrial and Engineering Chemistry, in press. doi: 10.1016/j.jiec.2019.09.006
  2. Xu, C.; Yu, Y.; Sun, Y.; Kong, L.; Yang, C.; Hu, M.; Yang, T.; Zhang, J.; Hu, Q.; Zhang, Z. Transformable Nanoparticle-Enabled Synergistic Elicitation and Promotion of Immunogenic Cell Death for Triple-Negative Breast Cancer Immunotherapy. Advanced Functional Materials, 2019, in press. doi: 10.1002/adfm.201905213
  3. Beldman, T.J.; Malinova, T.S.; Desclos, E.; Grootemaat, A.E.; Misiak, A.L.S.; van der Velden, S.; van Roomen, C.P.A.A.; Beckers, L.; van Veen, H.A.; Krawczyk, P.M.; Hoebe, R.A.; Sluimer, J.C.; Neele, A.E.; de Winther, M.P.J.; van der Wel, N.N.; Lutgens, E.; Mulder, W.J.M.; Huveneers, S.; Kluza, E. Nanoparticle-Aided Characterization of Arterial Endothelial Architecture during Atherosclerosis Progression and Metabolic Therapy. ACS Nano, in press. doi: 10.1021/acsnano.8b08875
  4. Akl, M.A.; Kartal-Hodzic, A.; Suutari, T.; Oksanen, T.; Montagner, I.M.; Rosato, A.; Ismael, H.R.; Afouna, M.I.; Caliceti, P.; Yliperttula, M.; Samy, A.M.; Mastrotto, F.; Salmaso, S.; Viitala, T. Real-Time Label-Free Targeting Assessment and in Vitro Characterization of Curcumin-Loaded Poly-lactic-co-glycolic Acid Nanoparticles for Oral Colon Targeting. ACS Omega, 2019, 4(16), 16878–16890. doi: 10.1021/acsomega.9b02086
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