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
Found better price? Let us know and we will propose the way forward!

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

Customers also purchased with this product

BDP® FL maleimide

BDP FL maleimide is a bright and photostable thiol-reactive dye for protein labeling, an ideal replacement for fluorescein for microscopy.

Cyanine5 amine

Cyanine5 amine functionalized dye for the coupling with activated esters and epoxides.
Add this product to your cart and
get free express delivery

Cyanine5.5 amine

Amino derivative of Cyanine5.5, a far red emitting fluorescent cyanine dye.
Add this product to your cart and
get free express delivery

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
Show more (7)
Your item has been added. View your cart or proceed to checkout
The count of items is incorrect.