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. Feng, C.; Ouyang, J.; Tang, Z.; Kong, N.; Liu, Y.; Fu, L.; Ji, X.; Xie, T.; Farokhzad, O.C.; Tao, W. Germanene-Based Theranostic Materials for Surgical Adjuvant Treatment: Inhibiting Tumor Recurrence and Wound Infection. Matter, in press. doi: 10.1016/j.matt.2020.04.022
  2. Xu, J.; Guo, J.; Golob-Schwarzl, N.; Haybaeck, J.; Qiu, X.; Hildebrandt, N. Single-measurement multiplexed quantification of microRNAs from human tissue using catalytic hairpin assembly and Förster resonance energy transfer. ACS Sensors, in press. doi: 10.1021/acssensors.0c00432
  3. Xu, N.; Yang, Y.-F.; Chen, L.; Lin, J. A Ferritin–Albumin–Cu Nanoparticle that Efficaciously Delivers Copper(II) Ions to a Tumor and Improves the Therapeutic Efficacy of Disulfiram. ACS Omega, 2020, 5(18), 10415–10422. doi: 10.1021/acsomega.0c00293
  4. Ko, Y.J.; Lee, J.W.; Kim, H.; Cho, E.; Yang, Y.; Kim, I.-S.; Kim, S.H.; Kwon, I.C. Versatile activatable vSIRPα-probe for cancer-targeted imaging and macrophage-mediated phagocytosis of cancer cells. Journal of Controlled Release, 2020, 323, 376–386. doi: 10.1016/j.jconrel.2020.04.037
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