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: 209000
Emission maximum, nm: 710
Fluorescence quantum yield: 0.2
CF260: 0.07
CF280: 0.03

Product citations

  1. Li, G.; Lei, Q.; Wang, F.; Deng, D.; Wang, S.; Tian, L.; Shen, W.; Cheng, Y.; Liu, Z. Wu, S. Fluorinated Polymer Mediated Transmucosal Peptide Delivery for Intravesical Instillation Therapy of Bladder Cancer. Small, in press. doi: 10.1002/smll.201900936
  2. Narayanaswamy, V.P.; Duncan, A.P.; LiPuma, J.J.; Wiesmann, W.P.; Baker, S.M.; Townsend, S.M. In Vitro Activity of a Novel Glycopolymer against Biofilms of Burkholderia cepacia Complex Cystic Fibrosis Clinical Isolates. Antimicrobial Agents and Chemotherapy. doi: 10.1128/AAC.00498-19
  3. Kashfi-Sadabad, R.; Gonzalez-Fajardo, L.; Hargrove, D.; Ahmadi, B:, Munteanu, D.; Shahbazmohamadi, S.; Jay, M.; Lu, X. Engineering Multifunctional Gold Decorated Dendritic Mesoporous Silica/Tantalum Oxide Nanoparticles for Intraperitoneal Tumor-Specific Delivery. Particle & Particle Systems Characterization, 2019, 36(4), 1900058. doi: 10.1002/ppsc.201900058
  4. Spinelli, A.; Girelli, M.; Arosio, D.; Polito, L.; Podini, P.; Martino, G.; Seneci, P.; Muzio, L.; Menegon, A. Intracisternal delivery of PEG-coated gold nanoparticles results in high brain penetrance and long-lasting stability. Journal of Nanobiotechnology, 2019, 17, 49. doi: 10.1186/s12951-019-0481-3
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