Cyanine3 carboxylic acid

Cat. # Quantity Price Lead time
11090 1 mg $110 in stock
21090 5 mg $210 in stock
41090 25 mg $410 in stock
51090 50 mg $695 in stock
61090 100 mg $1190 in stock
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Free Cyanine3 carboxylic acid (Cy3® carboxylic acid analog), non-activated dye. Non-sulfonated reagent, with good solubility in organic solvents and limited aqueous solubility. The dye can be used as a non-reactive fluorophore for control experiments, and for calibration.

For coupling with amines, and labeling, consider using Cyanine3 NHS ester, or water-soluble sulfo-Cyanine3 NHS ester.

Cyanine3 absorbance and emission spectra

Cyanine3 absorbance and emission spectra

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General properties

Appearance: red powder
Molecular weight: 493.08
CAS number: 1361402-15-4 (inner salt), 1032678-01-5 (chloride), 1251915-29-3 (iodide)
Molecular formula: C30H37ClN2O2
Solubility: soluble in organic solvents (DMF, DMSO, dichloromethane), poorly soluble in water (1.8 g/L = 4.0 mM)
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/absorption maximum, nm: 555
ε, L⋅mol−1⋅cm−1: 150000
Emission maximum, nm: 570
Fluorescence quantum yield: 0.31
CF260: 0.04
CF280: 0.09

Product citations

  1. De Pauw, E.; Chen, Y.; De Keersmaecker, H.; De Coninck, E.; De Smet, L.; De Geest, B.; Braeckmans, K.; Vervaet, C.; Vanhoorne, V. Drying Behaviour and Visualization of Surfactants after Co-Spray Drying of Surfactant-Stabilized Aqueous Suspensions. International Journal of Pharmaceutics, 2023, 643, 123231. doi: 10.1016/j.ijpharm.2023.123231
  2. Xu, S.; Zhang, P.; Heing-Becker, I.; Zhang, J.; Tang, P.; Bej, R.; Bhatia, S.; Zhong, Y.; Haag, R. Dual Tumor- and Subcellular-Targeted Photodynamic Therapy Using Glucose-Functionalized MoS2 Nanoflakes for Multidrug-Resistant Tumor Ablation. Biomaterials, 2022, 290, 121844. doi: 10.1016/j.biomaterials.2022.121844
  3. Mattila, J. T.; Beaino, W.; White, A. G.; Nyiranshuti, L.; Maiello, P.; Tomko, J.; Frye, L. J.; Fillmore, D.; Scanga, C. A.; Lin, P. L.; Flynn, J. L.; Anderson, C. J. Retention of 64Cu-FLFLF, a Formyl Peptide Receptor 1-Specific PET Probe, Correlates with Macrophage and Neutrophil Abundance in Lung Granulomas from Cynomolgus Macaques. ACS Infect. Dis., 2021, 7(8), 2264–2276. doi: 10.1021/acsinfecdis.0c00826
  4. Nishiyama, K.; Maeki, M.; Ishida, A.; Tani, H.; Hisamoto, H.; Tokeshi, M. Simple Approach for Fluorescence Signal Amplification Utilizing a Poly(Vinyl Alcohol)-Based Polymer Structure in a Microchannel. ACS Omega, 2021, 6(12), 8340–8345. doi: 10.1021/acsomega.1c00057
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