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.

Absorption and emission spectra of Cyanine3 fluorophore

Absorption and emission spectra of Cyanine3 fluorophore

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General properties

Appearance: red powder
Mass spec M+ increment: 474.2
Molecular weight: 641.5
CAS number: 1393427-85-4 (without anion), 1393363-07-9 (chloride)
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: 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
Product specifications

Spectral properties

Excitation 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. Hortelao, A.C.; Carrascosa, R.; Murillo-Cremaes, N.; Patiño, T.; Sanchez, S. Targeting 3D Bladder Cancer Spheroids with Urease-Powered Nanomotors. ACS Nano, in press. doi: 10.1021/acsnano.8b06610
  2. Li, L.; Yang, J.; Soodvilai, S.; Wang, J.; Opanasopit, P.; Kopeček, J. Drug-free albumin-triggered sensitization of cancer cells to anticancer drugs. Journal of Controlled Release, 2019, 293, 84–93. doi: 10.1016/j.jconrel.2018.11.015
  3. Ye, K.; Sinawang, P.D.; Yoong, A.T.I.; Marks, R.S. Photoinducible silane diazirine as an effective crosslinker in the construction of a chemiluminescent immunosensor targeting a model E. coli analyte. Sensors and Actuators B: Chemical, 2018, 256, 234–242. doi: 10.1016/j.snb.2017.10.058
  4. Smith, W.J.; Wang, G.; Gaikwad, H.; Vu, V.P.; Groman, E.; Bourne, D.W.A.; Simberg, D. Accelerated Blood Clearance of Antibodies by Nanosized Click Antidotes. ACS Nano, 2018, 12(12), 12523–12532. doi: 10.1021/acsnano.8b07003
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