Cyanine5.5 maleimide

Cat. # Quantity Price Lead time
17080 1 mg $110.00 in stock
27080 5 mg $210.00 5 days
47080 25 mg $410.00 in stock
57080 50 mg $695.00 in stock
67080 100 mg $1190.00 in stock

Cyanine5.5 maleimide is a thiol reactive dye which is capable of selective labeling of sulfhydryl groups in proteins, an analog of Cy5.5® maleimide.

Near infrared emission of Cyanine5.5 makes this dye suitable for bioimaging applications.

Cyanine5.5 can replace 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 powder
Molecular weight: 741.36
CAS number: 1594414-90-0, 1854918-28-7 (without anion), 1593644-50-8 (chloride)
Molecular formula: C46H49ClN4O3
IUPAC name: 1H-​Benz[e]​indolium, 2-​[5-​[3-​[6-​[[2-​(2,​5-​dihydro-​2,​5-​dioxo-​1H-​pyrrol-​1-​yl)​ethyl]​amino]​-​6-​oxohexyl]​-​1,​3-​dihydro-​1,​1-​dimethyl-​2H-​benz[e]​indol-​2-​ylidene]​-​1,​3-​pentadien-​1-​yl]​-​1,​1,​3-​trimethyl-
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: 24 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. Galstyan, A.; Chiechi, A.; Korman, A.J.; Sun, T.; Isreal, L.L.; Braubach, O.; Patil, R.; Shatalova, E.; Ljubimov, V.A.; Markman, J.; Grodzinski, Z.; Black, K.L.; Penichet, M.L.; Holler, E.; Ljubimov, A.V.; Ding, H.; Ljubimova, J.Y. Nano immunoconjugates crossing blood-brain barrier activate local brain tumor immune system for glioma treatment. bioRxiv, preprint. doi: 10.1101/466508
  2. Gardinier, T.C.; Turker, M.Z.; Hinckley, J.A.; Katt, W.P.; DomNwachukwu, N.; Woodruff, F.; Hersh, J.; Wang, J.; Cerione, R.A.; Wiesner, U.B. Controlling Surface Chemical Heterogeneities of Ultrasmall Fluorescent Core–Shell Silica Nanoparticles as Revealed by High-Performance Liquid Chromatography. The Journal of Physical Chemistry C, 2019, 123(37), 23246–23254. doi: 10.1021/acs.jpcc.9b06905
  3. Chen, C.; Corry, B.; Huang, L.; Hildebrandt, N. FRET-modulated multi-hybrid nanoparticles for brightness-equalized single-wavelength barcoding. Journal of the American Chemical Society, 2019, 141(28), 11123–11141. doi: 10.1021/jacs.9b03383
  4. Guo, S.; Xiao, X.; Wang, X.; Luo, Q.; Zhu, H.; Zhang, H.; Li, H.; Gong, Q.; Luo, K. Reductive microenvironment responsive gadolinium-based polymers as potential safe MRI contrast agents. Biomaterials Science, 2019, 7(5), 1919–1932. doi: 10.1039/c8bm01103f
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