Cyanine5.5 NHS ester

Cat. # Quantity Price Lead time
17020 1 mg $110.00 in stock
27020 5 mg $210.00 in stock
47020 25 mg $410.00 in stock
57020 50 mg $695.00 in stock
67020 100 mg $1190.00 in stock

Cyanine5.5 NHS ester is a reactive dye for the labeling of amino-groups in peptides, proteins, and oligonucleotides, an analog of Cy5.5® NHS ester.

Cy5.5 is a far-red (and near-infrared) emitting dye which is ideal for fluorescence measurements where background fluorescence is a concern. It is also suitable for in vivo NIR imaging experiments.

This reagent can replace NHS esters of Cy5.5® and DyLight 680.

Cy5.5 absorbance and emission spectra

Cy5.5 absorbance and emission spectra

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Sulfo-Cyanine5.5 amine

Sulfo-Cyanine5.5 is a far red/NIR fluorophore possessing high hydrophilicity and aqueous solubility. The dye displays good brightness in far red region due to outstanding molar extinction coefficient. This is amine derivative which is reactive towards electrophiles. It can also be used for enzymatic transamination labeling.

General properties

Appearance: dark blue solid
Molecular weight: 767.66
CAS number: 2375105-86-3
Molecular formula: C44H46N3BF4O4
IUPAC name: 1H-​Benz[e]​indolium, 2-​[5-​(1,​3-​dihydro-​1,​1,​3-​trimethyl-​2H-​benz[e]​indol-​2-​ylidene)​-​1,​3-​pentadien-​1-​yl]​-​3-​[6-​[(2,​5-​dioxo-​1-​pyrrolidinyl)​oxy]​-​6-​oxohexyl]​-​1,​1-​dimethyl-
Solubility: soluble in organic solvents (DMSO, DMF, dichloromethane), practically insoluble in water (< 1 uM, < 1 mg/L)
Quality control: NMR 1H, 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: 684
ε, L⋅mol−1⋅cm−1: 198000
Emission maximum, nm: 710
Fluorescence quantum yield: 0.2
CF260: 0.07
CF280: 0.03

Product citations

  1. Bellat, V.; Michel, A.O.; Thomas, C.; Stokol, T.; Choi, B.; Law, B. A urinary drug-disposing approach as an alternative to intravesical chemotherapy for treating non-muscle invasive bladder cancer. Cancer Research, in press. doi: 10.1158/0008-5472.CAN-21-2897
  2. Zahid, M.; McCandless, K.; Mishra, S.; Stiltner, J.; Feldman, K.; Yagi, H.; Yurko, R.; Islam, K.; Brown, J.; Frizzell, R. Novel Lung Targeting Cell Penetrating Peptides as Vectors for Delivery of Therapeutics. Research Square, preprint. doi: 10.21203/
  3. Chung, I.J.; Moon, H.; Jeon, S.I.; Lee, H.J.; Ahn, C.-H. Ultrasound-triggered imaging and drug delivery using microbubble-self-aggregate complexes. Journal of Biomaterials Science, Polymer Edition, 2022, 33(1), 57–76. doi: 10.1080/09205063.2021.1976362
  4. Guo, H.; Liu, L.; Hu, Q.; Dou, H. Monodisperse ZIF-8@dextran nanoparticles co-loaded with hydrophilic and hydrophobic functional cargos for combined near-infrared fluorescence imaging and photothermal therapy. Acta Biomaterialia, 2022, 137, 290–304. doi: 10.1016/j.actbio.2021.10.006
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