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®, Alexa Fluor 680, and DyLight 680.

Cy5.5 absorbance and emission spectra

Cy5.5 absorbance and emission spectra

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FAM amine, 6-isomer

Amine derivative of fluorescein (FAM) fluorophore, pure 6-isomer, for the enzymatic transamination labeling, reactions with electrophilic reagents, and reductive amination.

General properties

Appearance: dark blue solid
Molecular weight: 767.66
CAS number: 1469277-96-0, 2054318-82-8 (chloride); 1469541-53-4, 1874250-60-8 (without anion)
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 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. Liu, L.; Xu, Y.; Zhang, P.; You, J.; Li, W.; Chen, Y.; Li, R.; Rui, B.; Dou, H. High-order Assembly Towards Polysaccharide-Based Complex Coacervate Nanodroplets Capable of Targeting Cancer Cells. Langmuir, 2020, 36(29), 8580–8588. doi: 10.1021/acs.langmuir.0c01458
  2. Lim, Y.G.; Kim, H.J.; Kim, J.W.; Park, K. Calcium-binding near-infrared fluorescent nanoprobe for bone tissue imaging. Journal of Industrial and Engineering Chemistry, 2020, 89, 442–447. doi: 10.1016/j.jiec.2020.06.018
  3. Martín-Moreno, A.; Jiménez Blanco, J.L.; Mosher, J.; Swanson, D.R.; García Fernández, J.M.; and Sharma, A.; Ceña, V.; Muñoz-Fernández, M.A. Nanoparticle-Delivered HIV Peptides to Dendritic Cells a Promising Approach to Generate a Therapeutic Vaccine. Pharmaceutics, 2020, 12(7), 656. doi: 10.3390/pharmaceutics12070656
  4. Srinageshwar, B.; Florendo, M.; Clark, B.; Johnson, K.; Munro, N.; Peruzzaro, S.; Antcliff, A.; Andrews, M.; Figacz, A.; Swanson, D.; Dunbar, G.L.; Sharma, A.; Rossignol, J. A Mixed-Surface Polyamidoamine Dendrimer for In Vitro and In Vivo Delivery of Large Plasmids. Pharmaceutics, 2020, 12(7), 619. doi: 10.3390/pharmaceutics12070619
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