Cyanine3 NHS ester

Cat. # Quantity Price Lead time
11020 1 mg 110.00$ in stock
21020 5 mg 210.00$ in stock
41020 25 mg 410.00$ in stock
51020 50 mg 695.00$ in stock
61020 100 mg 1190.00$ in stock

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®, Alexa Fluor 546, and DyLight 549.

Cy3 absorbance and emission spectra

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Sulfo-Cyanine3 NHS ester

Water soluble sulfo-Cyanine3 SE activated ester for amino-biomolecule labeling.

Cyanine5 NHS ester

Amine-reactive Cyanine5 activated ester for the labeling of proteins, peptides, and other molecules.

Cyanine7 NHS ester

Amine reactive NHS ester of near infrared dye Cyanine7.

General properties

Appearance: red powder
Mass spec M+ increment: 474.2
Molecular weight: 590.15
Molecular formula: C34H40ClN3O4
CAS number: 1032678-38-8, 1032815-92-1
Solubility: soluble in organic solvents (DMF, DMSO, dichloromethane), insoluble in water
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

Spectral properties

Excitation maximum, nm: 555
ε, L⋅mol−1⋅cm−1: 150000
Emission maximum, nm: 570
Fluorescence quantum yield: 0.31

Product citations

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  2. Søndergaard, S.; Aznauryan, M.; Haustrup, E.K.; Schiøtt, B.; Birkedal, V.; Corry, B. Dynamics of Fluorescent Dyes Attached to G-Quadruplex DNA and their Effect on FRET Experiments. ChemPhysChem, 2015, 16(12), 2562–2570. doi: 10.1002/cphc.201500271
  3. Li, X.-P.; Jing, W.; Sun, J.-J.; Liu, Z.-Y.; Zhang, J.-T.; Sun, W.; Zhu, W.; Fan, Y.-Z. A potential small-molecule synthetic antilymphangiogenic agent norcantharidin inhibits tumor growth and lymphangiogenesis of human colonic adenocarcinomas through blocking VEGF-A,-C,-D/VEGFR-2,-3 "multi-points priming" mechanisms in vitro and ... BMC Cancer, 2015, 15, 527. doi: 10.1186/s12885-015-1521-5
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  6. Choi, E.B.; Choi, J.; Bae, S.R.; Kim, H.-O.; Jang, E.; Kang, B.; Kim, M.-H.; Kim, B.; Suh, J.-S.; Lee, K. et al. Colourimetric redox-polyaniline nanoindicator for in situ vesicular trafficking of intracellular transport. Nano Research, 2015, 8(4), 1169–1179. doi: 10.1007/s12274-014-0597-6
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