Sulfo-Cyanine5.5 carboxylic acid

Cat. # Quantity Price Lead time
17390 1 mg $110.00 in stock
27390 5 mg $290.00 in stock
47390 25 mg $690.00 in stock
57390 50 mg $1190.00 in stock
67390 100 mg $1850.00 in stock

Sulfo-Cyanine5.5 (analog of Cy5.5®) is a water-soluble, far red emitting fluorophore. Due to four sulfo-groups, the dye possesses negative charge in neutral pH, and very high hydrophilicity.

As a cyanine dye, sulfo-Cyanine5.5 shows very low dependence of the fluorescence on pH, and very high extinction coefficient.

Sulfo-Cyanine5.5 absorption and emission spectra

Sulfo-Cyanine5.5 absorption and emission spectra

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General properties

Appearance: dark blue solid
Molecular weight: 1017.31
CAS number: 2183440-68-6 (inner salt)
Molecular formula: C40H39K3N2O14S4
Solubility: Well soluble in water, DMF, DMSO (0.39 M = 400 g/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: 673
ε, L⋅mol−1⋅cm−1: 235000
Emission maximum, nm: 691
CF260: 0.09
CF280: 0.11

Product citations

  1. Wild, A.R.; Sinnen, B.L.; Dittmer, P.J.; Kennedy, M.J.; Sather, W.A.; Dell'Acqua, M.L. Synapse-to-Nucleus Communication through NFAT Is Mediated by L-type Ca2+ Channel Ca2+ Spike Propagation to the Soma. Cell Reports, 2019, 26, 3537–3550.e4. doi: 10.1016/j.celrep.2019.03.005
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