sulfo-Cyanine7 carboxylic acid

Cat. # Quantity Price Lead time
15390 1 mg
$105.00
5 days
25390 5 mg
$279.90
in stock
45390 25 mg
$649.90
in stock
55390 50 mg
$1199.00
in stock
65390 100 mg
$2399.00
in stock
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sulfo-Cyanine7 carboxylic acid is a non-reactive water-soluble near-infrared dye.

The reagent is useful as a fluorescent marker in the NIR range when attachment to other molecules is not desired. It has high hydrophilicity and aqueous solubility, improved quantum yield in the NIR range, and a very high molar extinction coefficient.

This reagent contains free carboxylic acid function. Pre-activated activated ester - sulfo-Cyanine7 NHS ester is also available.

Sulfo-Cyanine7 absorbance and emission spectra

Sulfo-Cyanine7 absorbance and emission spectra

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General properties

Appearance: dark green powder
Molecular weight: 746.97
CAS number: 2104632-29-1 (inner salt); 2104632-30-4 (sodium salt)
Molecular formula: C37H43N2KO8S2
Solubility: Soluble in water, DMF, DMSO (0.10 M = 76 g/L). Practically insoluble in non-polar organic solvents.
Quality control: NMR 1H, HPLC (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.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 750
ε, L⋅mol−1⋅cm−1: 240600
Emission maximum, nm: 773
Fluorescence quantum yield: 0.24
CF260: 0.04
CF280: 0.04

Product citations

  1. Manrique, G.; Gottraux, J.; Matoori, S. Mechanistic Insights into HRP-Catalyzed Oxidation of the Near-Infrared Fluorescent Dye Sulfo-Cyanine 7. ACS Meas. Sci. Au, 2025, 5(1), 130–134. doi: 10.1021/acsmeasuresciau.4c00080
  2. Zahorska, E.; Denig, L. M.; Lienenklaus, S.; Kuhaudomlarp, S.; Tschernig, T.; Lipp, P.; Munder, A.; Gillon, E.; Minervini, S.; Verkhova, V.; Imberty, A.; Wagner, S.; Titz, A. High-Affinity Lectin Ligands Enable the Detection of Pathogenic Pseudomonas Aeruginosa Biofilms: Implications for Diagnostics and Therapy. JACS Au, 2024, 4(12), 4715–4728. doi: 10.1021/jacsau.4c00670
  3. Matoori, S.; Mooney, D.J. Near-Infrared Fluorescence Hydrogen Peroxide Assay for Versatile Metabolite Biosensing in Whole Blood. Small, 2020, 16(20), 2000369. doi: 10.1002/smll.202000369
  4. Pfister, J.; Summer, D.; Petrik, M.; Khoylou, M.; Lichius, A.; Kaeopookum, P.; Kochinke, L.; Orasch, T.; Haas, H.; Decristoforo, C. Hybrid Imaging of Aspergillus fumigatus Pulmonary Infection with Fluorescent, 68Ga-Labelled Siderophores. Biomolecules, 2020, 10, 168. doi: 10.3390/biom10020168
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