Cyanine3 NHS ester

Cat. # Quantity Price Lead time
11020 1 mg $91 in stock
21020 5 mg $119 in stock
41020 25 mg $380 in stock
51020 50 mg $670 in stock
61020 100 mg $1150 in stock
81020 1 g please inquire 12 days
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Cyanine3 NHS ester is a reactive dye for the labeling of amino-groups in biomolecules, an analog of Cy3® NHS ester. This reagent is ideal for the labeling of soluble proteins, peptides, and oligonucleotides/DNA. For delicate proteins consider using water-soluble sulfo-Cyanine3 NHS ester which does not require use of any co-solvent.

Cyanine3 NHS ester is a replacement for NHS esters of Cy3® and DyLight 549.

Absorption and emission spectra of Cyanine3

Absorption and emission spectra of Cyanine3

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General properties

Appearance: red powder
Mass spec M+ increment: 439.5
Molecular weight: 641.5
CAS number: 2632339-91-2
Molecular formula: C34H40N3BF4O4
IUPAC name: 3H-​Indolium, 2-​[3-​(1,​3-​dihydro-​1,​3,​3-​trimethyl-​2H-​indol-​2-​ylidene)​-​1-​propen-​1-​yl]​-​1-​[6-​[(2,​5-​dioxo-​1-​pyrrolidinyl)​oxy]​-​6-​oxohexyl]​-​3,​3-​dimethyl-​, tetrafluoroborate
Solubility: poorly soluble in water (2.3 mM = 1.5 g/L), soluble in organic solvents (DMF, DMSO, dichloromethane)
Quality control: NMR 1H and HPLC-MS (95+%)
Storage conditions: Storage: 12 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. Feld, L. G.; Boehme, S. C.; Morad, V.; Sahin, Y.; Kaul, C. J.; Dirin, D. N.; Rainò, G.; Kovalenko, M. V. Quantifying Förster Resonance Energy Transfer from Single Perovskite Quantum Dots to Organic Dyes. ACS Nano, 2024. doi: 10.1021/acsnano.3c11359
  2. Deng, L.; Olea, A.R.; Ortiz‐Perez, A.; Sun, B.; Wang, J.; Pujals, S.; Palmans, A.R.A.; Albertazzi, L. Imaging Diffusion and Stability of Single‐Chain Polymeric Nanoparticles in a Multi‐Gel Tumor‐on‐a‐Chip Microfluidic Device. Small methods, 2024, 2301072. doi: 10.1002/smtd.202301072
  3. Oh, H.J.; Lee, Y.; Hwang, H.; Hong, K.; Choi, H.; Kang, J.Y.; Jung, Y. Size-controlled synthesis of phase separated protein condensates with interfacial protein cages. chemRxiv, 2024, preprint. doi: 10.26434/chemrxiv-2024-nkftl
  4. Maltseva, D.; Chatterjee, S.; Yu, C.-C.; Brzezinski, M.; Nagata, Y.; Gonella, G.; Murthy, A. C.; Stachowiak, J. C.; Fawzi, N. L.; Parekh, S. H.; Bonn, M. Fibril Formation and Ordering of Disordered FUS LC Driven by Hydrophobic Interactions. Nature Chemistry, 2023, 15(8), 1146–1154. doi: 10.1038/s41557-023-01221-1
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